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1. 43 Engine Cooling System Ee 29 Disassembly and Assembly sssssss 43 Engine Cooling System Schematic 30 InSDecllOrI 4 eent sn tix feb utin 44 SYMPTOM DIAGNOSIS eee 31 WATER PUMP u sssssssssssssssssssssssssssseessssssseeees 45 OVERH EATING CAUSE ANALYSIS HEEL ERE 31 EA OTTEN e Troubleshooting Chart ssssssssss 31 IhSpeCtion egen EE 46 PERIODIC MAINTENANCE BEBE BREE 33 WATER INLET AND THERMOSTAT ASSEM ENGINE COOLANT eee 35 BLY GENEE 47 ee EE 33 Exploded View ENEE 47 Draining EE 33 Removal and Installation En 47 Refilling NEEN 34 Inspection ENEE 48 Flushing DT TTT 35 SERVICE DATA AND SPECIFICATIONS RADIATOR EEN Sr ODS EEN 50 RADIATOR CAP tee Eeer ere 37 SERVICE DATA AND SPECIFICATIONS RADIATOR CAP Inspection VARRI e EE 50 RADIATOR ge 37 GE Mainienanee EE RADIATOR egenen Se EE E REMOVAL AND INSTALLATION 39 CO 2 Revision 2010 June 2011 M37 M56 PRECAUTIONS lt PRECAUTION gt VQ37VHR PRECAUTION PRECAUTIONS Precaution for Supplemental Restraint System SRS AIR BAG and SEAT BELT PRE TENSIONER INFOID 0000000006466769 The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE TENSIONER used along with a front seat belt helps to reduce the risk or severity of injury to the driver and front passenger for c
2. Driving in low gear for ex tended time Driving at extremely high speed Powertrain system malfunc tion Installed improper size wheels and tires Dragging brakes Improper ignition timing Blocked or restricted air flow Blocked bumper Blocked radiator grille Installed car brassiere Mud contamination or paper clogging Blocked radiator Blocked condenser Blocked air flow Installed large fog lamp Revision 2010 June CO 7 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VQ37VHR PERIODIC MAINTENANCE ENGINE COOLANT n S pect i O n INFOID 0000000005984811 LEVEL Check if the reservoir tank engine coolant level is within the MIN to MAX when the engine is cool A MAX B MIN Adjust the engine coolant level if necessary Check that the reservoir tank cap is tightened JPBIA0102ZZ LEAKAGE To check for leakage apply pressure to the cooling system with the radiator cap tester and radiator cap tester adapter commercial service tool A Testing pressure Refer to CO 26 Radiator WARNING Never remove radiator cap when engine is hot Serious burns could occur from high pressure engine coolant escaping from water inlet front CAUTION Higher test pressure than specified may cause radiator dam JPBIAOA112Z age NOTE In a case that engine coolant decreases replenish radiator with engine coolant If anyt
3. Note the following and install in the reverse order of removal CAUTION Use genuine mounting bolts for the cooling fan assembly and strictly observe the tightening torque Breakage prevention for radiator NOTE Insert the radiator hose 1 all the way to the stopper 2 or by 33 mm 1 30 in hose without a stopper JSBIA0238GB Unit mm in A Radiator side B Engine side For the orientation of the hose clamp pawl refer to the figure Radiator hose Hose end Paint mark Position of hose clamp Radiator side Upper A Radiator hose upper Engine side Upper B Radiator side Lower C Radiator hose lower Engine side Right side D Refer to the illustrations for the specific position each hose clamp tab j 4 ech Xp JSBIA0239ZZ a 30 b 45 4 Vehicle upper Revision 2010 June CO 15 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VQ37VHR The angle a created by the hose clamp pawl and the specified line A must be within 30 as shown in the figure JSBIA02402Z To install hose clamps 1 check that the dimension A from the end of the paint mark 2 on the radiator hose to the hose clamp is within the reference value Dimension A 71 41 mm JSBIA02412Z n S pect i O n INFOID 0000000005984819 INSPECTION AFTER INSTALLATION Check that the reservoir tank cap is
4. l malfunction Poor engine coolant quality Engine coolant density Insufficient engine coolant Revision 2010 June Engine coolant leakage Loose clamp Cooling hose Cracked hose Water pump Poor sealing Loose Radiator cap Poor sealing Radiator O ring for damage deterio ration or improper fitting Cracked radiator tank Cracked radiator core Reservoir tank Cracked reservoir tank Overflowing reservoir tank CO 31 Exhaust gas leakage into cooling system Cylinder head deterioration Cylinder head gasket deteri oration 2011 M37 M56 OVERHEATING CAUSE ANALYSIS lt SYMPTOM DIAGNOSIS gt Check items Symptom VK56VD Except cool ing system parts mal function Overload on engine Abusive driving High engine rpm under no load Driving in low gear for ex tended time Driving at extremely high speed Powertrain system malfunc tion Installed improper size wheels and tires Dragging brakes Improper ignition timing Blocked or restricted air flow Blocked bumper Blocked radiator grille Installed car brassiere Mud contamination or paper clogging Blocked radiator Blocked condenser Blocked air flow Installed large fog lamp Revision 2010 June CO 32 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VK56VD PERIODIC MAINTENANCE ENG
5. INSTALLATION 1 Install new O rings to water pump Apply engine oil to O ring 1 and engine coolant to O ring 3 as shown in the figure 2 Water pump Locate O ring with yellow paint mark A to front side Locate O ring with light blue paint mark B to rear side 2 Install water pump CAUTION Never allow cylinder block to nip O rings when installing water pump Check timing chain and water pump sprocket are engaged Insert water pump by tightening mounting bolts alternately and evenly 3 Install timing chain tensioner primary as follows a Turn crankshaft clockwise so that timing chain on the timing chain tensioner primary side is loose WATER PUMP Revision 2010 June CO 20 2011 M37 M56 WATER PUMP lt REMOVAL AND INSTALLATION gt VQ37VHR b Pull plunger stopper tab A up or turn lever downward so as to remove plunger stopper tab from the ratchet of plunger D NOTE Plunger stopper tab and lever C are synchronized c Push plunger into the inside of tensioner body d Hold plunger in the fully compressed position by engaging plunger stopper tab with the tip of ratchet e To secure lever insert stopper pin E through hole of lever into tensioner body hole B The lever parts and the tab are synchronized Therefore the plunger will be secured under this condition JPBIA0116ZZ NOTE Figure shows the example of 1 2 mm 0 047 in diameter thin screwdriver being used as the stopper pin f
6. M s Ge 0 43 37 ADOM AFA S 0 35 30 Sg C A ERER I Fees ply d l 7 SS Ex Sg 3 4 0 35 30 JPBIA2342GB 1 Cooling fan RH 2 Cooling fan LH 3 Fan shroud 4 Fan motor 1 5 Cooling fan control module 1 6 Fan motor 2 7 Cooling fan control module 2 8 Grommet A Apply on fan motor shaft Apply high strength thread locking sealant or equivalent Refer to GlI 4 Components for symbols not described on the above Removal and Installation INFOID 0000000005984851 REMOVAL 1 Remove air cleaner case LH and air duct inlet Refer to EM 184 Exploded View 2 Remove reservoir tank and drain hose Refer to CO 39 Exploded View 3 Remove A T fluid cooler tube from fan shroud 4 Remove harness clips from fan shroud 5 Disconnect harness connector from cooling fan control modules 1 and 2 and move harness to aside 6 Remove cooling fan assembly CAUTION Be careful not to damage or scratch on radiator core INSTALLATION Note the following and install in the reverse order of removal CAUTION Only use genuine parts for cooling fan mounting bolt and observe the specified torque to prevent radiator from being damaged Disassembly and Assembly INFo1D 0000000005984882 DISASSEMBLY 1 Disconnect harness connector from fan shroud 2 Remove cooling fan control modules 1 and 2 from fan shroud CAUTION Handle carefully to avoid dropping and impact 3 Remove cooling fan mounting nuts and then remo
7. replace water pump JPBIA23152Z INSPECTION AFTER INSTALLATION Check that the reservoir tank cap is tightened Check for leakage of engine coolant using the radiator cap tester adapter commercial service tool and the radiator cap tester commercial service tool Refer to CO 33 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant Revision 2010 June CO 46 2011 M37 M56 WATER INLET AND THERMOSTAT ASSEMBLY lt REMOVAL AND INSTALLATION gt VK56VD WATER INLET AND THERMOSTAT ASSEMBLY Exploded View INFOID 0000000005984857 SEC 210 211 278 DI 22 0 2 2 16 9 22 0 2 2 16 JPBIA2318GB 1 Radiator cap 2 Water inlet 3 Clamp Water suction hose 5 Water suction pipe 6 Clamp Water hose 8 Water hose 9 Gasket 10 O ring 11 Heater pipe 12 Gasket 13 Water connector 14 O ring 15 Water pipe 16 Clamp 17 Water hose 18 Water pipe 19 Gasket 20 Thermostat housing 21 Thermostat 22 Gasket A To electric throttle control actuator B To radiator C Toreservoir tank D To oil cooler E To heater Refer to GlI 4 Components for symbols in the figure Re m oval a n d n stal ati O n INFOID 0000000005984858 REMOVAL 1 Remove front engine cover Refer to EM 182 Exploded View Revision 2010 June CO 47 2011 M37 M56 WATER INLET AND THERMOSTAT ASSEMBLY lt REMOVAL AND INSTALLATION gt VK56VD 2 Remove air duct inlet Refer to EM 1
8. 4 0 86 74 JPBIA2743GB 1 Gasket 2 Water inlet and thermostat assembly Refer to Gl 4 Components for symbols in the figure Re m oval a n d n stal lat i O n INFOID 0000000005984828 REMOVAL Remove engine cover Refer to EM 27 Exploded View Remove air duct and air cleaner case assembly LH Refer to EM 29 Exploded View Remove reservoir tank Refer to CO 13 Exploded View Remove engine undercover with power tool Drain engine coolant from radiator drain plug at the bottom of radiator Refer to CO 8 Draining CAUTION Perform this step when the engine is cold Never spill engine coolant on drive belt 6 Disconnect radiator hose lower 7 Disconnect intake valve timing control valve harness connector LH and remove intake valve timing con trol solenoid 8 Remove water inlet and thermostat assembly 1 St Ze Co S A Do notloosen these screw CAUTION Never disassemble water inlet and thermostat assembly Replace them as a unit if necessary JPBIA02612Z INSTALLATION Note the following and install in the reverse order of removal CAUTION Be careful not to spill engine coolant over engine room Use rag to absorb engine coolant Revision 2010 June CO 22 2011 M37 M56 WATER INLET AND THERMOSTAT ASSEMBLY lt REMOVAL AND INSTALLATION gt VQ37VHR n spect i O n INFOID 0000000005984829 INSPECTION AFTER REMOVAL 1 Check valve seating condition at ordinary room te
9. Fluids and Lubricants Engine coolant capacity Refer to CO 50 With reservoir tank at Periodical Maintenance MAX level Specification JPBIA3736ZZ Revision 2010 June CO 34 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VK56VD Reservoir tank engine cool Refer to CO 50 ant capacity Periodical Maintenanc At MAX level e Specification A MAN B MIN JPBIAO102ZZ 7 When engine coolant overflows air relief hole on radiator install air relief plug with new O ring fg 1 2 N m 0 12 kg m 11 in Ib 8 Refill reservoir tank to MAX level line with engine coolant 9 When engine coolant overflows air relief hole on heater hose install air relief plug with new O ring Then refill radiator with engine coolant fg 1 2 N m 0 12 kg m 11 in Ib 10 Install air cleaner case LH and air duct inlet 11 Install radiator cap 12 Warm up engine until opening thermostat Standard for warming up time is approximately 10 minutes at 3 000 rpm Check thermostat opening condition by touching radiator hose lower to see a flow of warm water CAUTION Watch water temperature gauge so as not to overheat engine 13 Stop the engine and cool down to less than approximately 50 C 122 F Cool down using fan to reduce the time If necessary refill radiator up to filler neck with engine coolant Remove the radiator cap to check the fluid level If the fluid level is low refil
10. For the orientation of the hose clamp pawl refer to the figure Radiator hose Hose end Paint mark Position of hose clamp Radiator side Upper A Radiator hose upper Engine side Upper B Radiator side Lower C Radiator hose lower Engine side Front side D Refer to the illustrations for the specific position each hose clamp tab JPBIA3743ZZ 4 Vehicle upper Revision 2010 June CO 41 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VK56VD The angle a created by the hose clamp pawl and the specified line A must be within X30 as shown in the figure JSBIA02402Z To install hose clamps 1 check that the dimension A from the end of the paint mark 2 on the radiator hose to the hose clamp is within the reference value Dimension A 71 41 mm JSBIA02412Z n S pect i O n INFOID 0000000005984849 INSPECTION AFTER INSTALLATION Check for leakage of engine coolant using the radiator cap tester adapter commercial service tool and the radiator cap tester commercial service tool Refer to CO 33 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant and A T fluid Check that the reservoir tank cap is tightened Revision 2010 June CO 42 2011 M37 M56 COOLING FAN lt REMOVAL AND INSTALLATION gt VK56VD COOLING FAN Exploded View INFOID 0000000005984850 SEC 214 8 CH 4 2 pa 0 45
11. INFOID o000000005954895 Cylinder block To heater zi From heater gi Lil To electric throttle iod Ka control actuator Cylinder head bank 1 Cylinder head bank 2 From electric throttle control actuator E Thermostat Water inlet Radiator JPBIA2364GB Revision 2010 June CO 29 2011 M37 M56 DESCRIPTION lt SYSTEM DESCRIPTION gt VK56VD Engine Cooling System Schematic INFOID 0000000005984837 Thermostat Closed Radiator tank Water inlet ay Thermostat Thermostat housing Oil cooler Water pump Cylinder block Cylinder head Heater Electric throttle control actuator JPBIA2411GB Revision 2010 June CO 30 2011 M37 M56 OVERHEATING CAUSE ANALYSIS lt SYMPTOM DIAGNOSIS gt SYMPTOM DIAGNOSIS OVERHEATING CAUSE ANALYSIS Troubleshooting Chart Symptom VK56VD INFOID 0000000005984838 Check items Poor heat transfer Water pump malfunction Worn or loose drive belt Thermostat stuck closed Damaged fins Dust contamination or pa per clogging Physical damage Clogged radiator cooling tube Excess foreign material rust dirt sand etc Reduced air flow Cooling fan does not oper ate High resistance to fan rota tion Damaged fan blades Fan assembly Damaged radiator shroud Improper engine coolant Cooling sys mixture ratio tem parts
12. Install timing chain tensioner primary e Remove dust and foreign material completely from backside of timing chain tensioner primary and from installation area of rear timing chain case g Remove stopper pin h Check again that timing chain and water pump sprocket are engaged 4 Install in the reverse order of removal for remaining parts CAUTION After starting engine let idle for three minutes then rev engine up to 3 000 rpm under no load to purge air from the high pressure chamber of chain tensioner Engine may produce a rattling noise This indicates that air still remains in the chamber and is not a matter of concern n S p e ct i O n INFOID 0000000005984826 INSPECTION AFTER REMOVAL Check for badly rusted or corroded water pump body assembly Check for rough operation due to excessive end play e If anything is found replace water pump SLC943A INSPECTION AFTER INSTALLATION Check that the reservoir tank cap is tightened Check for leakage of engine coolant using the radiator cap tester adapter and the radiator cap tester com mercial service tool Refer to CO 8 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant Revision 2010 June CO 21 2011 M37 M56 WATER INLET AND THERMOSTAT ASSEMBLY lt REMOVAL AND INSTALLATION gt VQ37VHR WATER INLET AND THERMOSTAT ASSEMBLY Exploded View INFOID 0000000005984827 SEC 210 211 e 8
13. draining all of engine coolant in the system open water drain plug on cylinder block Refer to EM 274 Disassembly and Assembly 2 Remove reservoir tank if necessary and drain engine coolant and clean reservoir tank before installing Revision 2010 June CO 33 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VK56VD 3 Check drained engine coolant for contaminants such as rust corrosion or discoloration If contaminated flush the engine cooling system Refer to CO 35 Flushing Refi i n d INFOID 0000000005984843 1 Remove air cleaner case LH and air duct inlet Refer to EM 184 Exploded View 2 Install reservoir tank if removed and radiator drain plug CAUTION Be sure to clean drain plug and install with new O ring CAR N m 0 12 kg m 11 in Ib If water drain plug on cylinder block is removed close and tighten it Refer to EM 274 Disassem bly and Assembly 3 Check that each hose clamp is firmly tightened 4 Remove air relief plug 1 on radiator left side A Vehicle front 5 Remove air relief plug 1 on heater hose side A Vehicle front JPBIA2343ZZ 6 Fill up the radiator with cooling water Pour engine coolant through engine coolant filler neck slowly of less than 20 2 1 8 US qt 1 3 4 Imp qt a minute to allow air in system to escape Use Genuine NISSAN Long Life Antifreeze Coolant or an equivalent mixed with water distilled or demineralized Refer to MA 12
14. sensor s and deploy the air bag s possibly causing serious injury When using air or electric power tools or hammers always switch the ignition OFF disconnect the battery and wait at least 3 minutes before performing any service Revision 2010 June CO 3 2011 M37 M56 PREPARATION lt PREPARATION gt VQ37VHR Commercial Service Tools inro10 0000000005964810 Tool name Description Power tool Loosening nuts and bolts PBICO190E Radiator cap tester Checking radiator and radiator cap PBIC1982bE Radiator cap tester adapter Adapting radiator cap tester to radiator cap and water outlet front filler neck 5 a 28 1 10 dia b 31 4 1 236 dia 8 Ties c 41 3 1 626 dia amp T ints Unit mm in S NT564 Revision 2010 June CO 4 2011 M37 M56 DESCRIPTION lt SYSTEMDESCRIPTION gt HEED SYSTEM DESCRIPTION DESCRIPTION E n d i ne Coo i n d Syste m INFOID 0000000005984806 To heater To electric throttle control actuator From heater SSC block 4 From electric throttle control actuator Cylinder head bank 2 Water inlet Cylinder head bank 1 DANS JPBIA1830GB Engine Cooling System Schematic InFo10 0000000005984807 Thermostat Thermostat housing Water pump by Cylinder block Electric m throttle control Cylinder head actuator Closed PBIC5028E Revision 2010 June CO 5 2011 M37 M56 OVERHEATING CAUSE ANA
15. tightened Check for leakage of engine coolant using the radiator cap tester adapter and the radiator cap tester com mercial service tool Refer to CO 8 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant and A T fluid A T models Revision 2010 June CO 16 2011 M37 M56 COOLING FAN lt REMOVAL AND INSTALLATION gt VQ37VHR COOLING FAN Exploded View INFOID 0000000005984820 SEC 214 jn 39 A ER FA zi 3 RL A JPBIA0240GB 1 Cooling fan RH 2 Cooling fan LH 3 Fan shroud 4 Fan motor 1 5 Fanmotor2 6 Cooling fan control module A Apply on fan motor shaft o Apply Genuine High Strength thread Locking Sealant or equivalent Refer to GI 4 Components for symbols in the figure Re moval and Installation INFOID 0000000005984821 REMOVAL 1 Remove reservoir tank and drain hose Refer to CO 13 Exploded View 2 Remove air cleaner case LH and air duct inlet Refer to EM 29 Exploded View 3 Disconnect harness connector from cooling fan control module and move harness to aside 4 Remove harness clips 5 Remove A T oil cooler tube from fanshroud 6 Remove cooling fan assembly from under the vehicle CAUTION Be careful not to damage or scratch on radiator core INSTALLATION Note the following and install in the reverse order of removal CAUTION Only use genuine parts for cooling fan mounting bolt and observe the specified torque to preven
16. 84 Exploded View 3 Remove reservoir tank Refer to CO 39 Exploded View 4 Remove engine undercover with a power tool 5 Drain engine coolant from drain plugs on radiator and cylinder block Refer to CO 33 Draining and EM CAUTION Perform this step when engine is cold Never spill engine coolant on drive belts Disconnect radiator hose upper and lower Refer to CO 39 Exploded View Remove water suction pipe and water suction hose Remove intake manifold Refer to EM 190 Exploded View Remove the following parts Move injector harness to the position without the hindrance for work Harness connector Harness clip 10 Remove fuel tube insulator 11 Remove fuel feed tube pump side and fuel feed tube bank side 12 Remove water inlet and thermostat 13 Remove water connector heater pipes and heater hoses 14 Remove thermostat housing INSTALLATION Note the following and install in the reverse order of removal CAUTION Be careful not to spill engine coolant over engine room Use rag to absorb engine coolant oO N O Thermostat Install thermostat with the whole circumference of each flange part A fit securely inside rubber ring 1 PBIC3315J Install thermostat with jiggle valve A facing upwards The position deviation may be within the range of 20 degrees b JPBIA2314Z2Z Water Connector and Heater Pipe First apply a neutral detergent to O rings then quickly insert the i
17. C MAINTENANCE eeeleenennennnnnnnnnn 8 dee et EE 25 ENGINE COOLANT erret g SERVICE DATA AND SPECIFICATIONS LAS Dol OEE eege EE 8 NEE 26 Draihing itta retento eet 8 Fiefillilig 2 5 et n tote tesi eere eene g SERVICE DATA AND SPECIFICATIONS PSTN iei os cates beet ae 10 SIDS wneerersesssseseeesensnsesnsesennnnesesetensnneseesensnneneaeaes 26 Periodical Maintenance Specification 26 RADIATOR qu eaten etaicdeslicraicestendants 11 EVO LEEI ol DEREN RTT 26 RADIATOR CAP Ee ag EE in E E 26 RADIATOR CAP Inspection sssusss 11 GE vu PRECAUTION Enn 27 EE EE II PRECAUTIONS nnns 27 REMOVAL AND INSTALLATION 13 Precaution for Supplemental Restraint System SRS AIR BAG and SEAT BELT PRE TEN RADIATOR eeereeeeene nennen kia aaa dana nnan 13 SIONER isset ise liver te d a Roda 27 Revision 2010 June CO 1 2011 M37 M56 PREPARATION enn 28 RADIATOR eegenen aaaea pioni aai qe esas eus 39 Exploded View eeeeeeeeeeeeee 39 PREPARATION eren 28 Removal and Installation sce 39 Commercial Service Tools sss 28 Ierger 42 SYSTEM DESCRIPTION 29 COOLING FAN cernere enne nnn nnn nnn 43 Exploded View oaii e aan n E 43 DESCRIPTION n dud a a a a A Rea RR Ra FR eK E uu 29 Removal and Installation
18. ENGINE SECTION C Q ENGINE COOLING SYSTEM VQ37VHR Exploded View eneer tnn 13 Removal and Installation esses 13 PRHECAUTION 2 225 2 2142 DUI cn ERN eased 3 e sos eate aie ted ie 16 PRECAUTIONS eese eene nnn 3 COOLING FAN 2 enne nennen nnn nanus 17 Precaution for Supplemental Restraint System Exploded View sess 17 SRS AIR BAG and SEAT BELT PRE TEN Removal and Installation ssssss 17 le ite ti tpe ttr ir bids 3 Disassembly and Assembly 17 Inspection cii rim et etn EE e Een 18 PREPARATION cerne nnn 4 WATER PUMP 5 ridi nra una na uina EEN uan 19 PREPARATION EE 4 Exploded VIEW EE 19 Commercial Service Tools tees 4 Removal and Installation eee 19 SYSTEM DESCRIPTION s 5 dee EI 21 WATER INLET AND THERMOSTAT ASSEM DESCRIPTION eebe REG re redox swa Engine Cooling System RAD DA i ak We 5 Exploded View see 5 edem eei 22 Engine Cooling System Schematic 5 Removal and Installation 22 SYMPTOM DIAGNOSIS 6 leen 23 OVERHEATING CAUSE ANALYSIS e WATER OUTLET AND WATER PIPING 24 Troubleshooting Chart s 6 Exploded View BEE 24 Removal and Installation 24 PERIODI
19. INE COOLANT n S pect i O n INFOID 0000000005984841 LEVEL e Check if the reservoir tank engine coolant level is within the MIN to MAX when the engine is cool A MAX B MIN Adjust the engine coolant level if necessary Check that the reservoir tank cap is tightened JPBIAO102ZZ LEAKAGE To check for leakage apply pressure to the cooling system with the radiator cap tester and radiator cap tester adapter commercial service tool A Testing pressure Refer to CO 50 Radiator WARNING Never remove radiator cap when engine is hot Serious burns could occur from high pressure engine coolant escaping from water inlet CAUTION Higher test pressure than specified may cause radiator dam JPBIA294477 age NOTE In a case that engine coolant decreases fill radiator with engine coolant If anything is found repair or replace damaged parts D ral n l n d INFOID 0000000005984842 WARNING Never change engine coolant when the engine is hot to avoid being scalded Wrap a thick cloth around radiator cap and carefully remove radiator cap First turn radiator cap a quarter of a turn to release built up pressure Then turn radiator cap all the way Never spill engine coolant on drive belt 1 Open radiator drain plug 1 at the bottom of radiator and then remove radiator cap si o A Radiator drain plug hole S amp S Vehicle front x N oN Lk JPBIA3169ZZ When
20. LYSIS lt SYMPTOM DIAGNOSIS gt VQ37VHR Troubleshooting Chart InFo10 0000000005884608 Symptom Check items Water pump malfunction Worn or loose drive belt Thermostat stuck closed Dust contamination or pa Poor heat transfer Damaged fins per clogging Physical damage Clogged radiator cooling Excess foreign material tube rust dirt sand etc Cooling fan does not oper ate Reduced air flow High resistance to fan rota Fan assembly tion Damaged fan blades Damaged radiator shroud Improper engine coolant u u u Cooling sys mixture ratio tem parts malfunction Poor engine coolant quality Engine coolant density Loose clamp Cooling hose Cracked hose Water pump Poor sealing Loose Radiator cap Poor sealing Engine coolant leakage Insufficient engine coolant Radiator O ring for damage deterio ration or improper fitting Cracked radiator tank Cracked radiator core Reservoir tank Cracked reservoir tank Overflowing reservoir tank CO 6 Revision 2010 June Exhaust gas leakage into cooling system Cylinder head deterioration Cylinder head gasket deteri oration 2011 M37 M56 OVERHEATING CAUSE ANALYSIS lt SYMPTOM DIAGNOSIS gt Check items Symptom VQ37VHR Except cool ing system parts mal function Overload on engine Abusive driving High engine rpm under no load
21. ain plugs on cylinder block are removed close and tighten them Refer to EM 81 Set ting Remove air relief plug 1 on radiator a Vehicle front JPBIA31672Z Fill radiator with water until water spills from the air relief holes then close air relief plugs Fill radiator and reservoir tank with water and reinstall radiator cap Tightening torque Refer to CO 13 Exploded View Run the engine and warm it up to normal operating temperature Rev the engine two or three times under no load Stop the engine and wait until it cools down Drain water from the system Refer to CO 8 Draining Repeat steps 1 through 7 until clear water begins to drain from radiator Check that the reservoir tank cap is tightened Revision 2010 June CO 10 2011 M37 M56 lt RADIATOR PERIODIC MAINTENANCE gt VQ37VHR RADIATOR RADIATOR CAP RADIATOR CAP Inspection INFOID 0000000005984815 Check valve seat A of radiator cap B Metal plunger Check if valve seat is swollen to the extent that the edge of the plunger B cannot be seen when watching it vertically from the top Check if valve seat has no soil and damage JPBIA0108ZZ Pull negative pressure valve to open it and check that it close completely when released Check that there is no dirt or damage on the valve seat of radiator cap negative pressure valve Check that there are no unusualness in the opening and closing conditions of negative pressure val
22. and Air Bag Module see the SRS AIR BAG Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual SRS wiring harnesses can be identified by yellow and or orange harnesses or har ness connectors PRECAUTIONS WHEN USING POWER TOOLS AIR OR ELECTRIC AND HAMMERS WARNING When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running DO NOT use air or electric power tools or strike near the sensor s with a hammer Heavy vibration could activate the sensor s and deploy the air bag s possibly causing serious injury When using air or electric power tools or hammers always switch the ignition OFF disconnect the battery and wait at least 3 minutes before performing any service Revision 2010 June CO 27 2011 M37 M56 PREPARATION lt PREPARATION gt VK56VD Commercial Service Tools INFOID 0000000005984840 Tool name Description Power tool Loosening bolts and nuts PBICO190E Radiator cap tester Checking radiator and radiator cap PBIC1982bE Radiator cap tester adapter Adapting radiator cap tester to radiator cap and water inlet filler neck 5 a 28 1 10 dia b 31 4 1 236 dia 8 Ties c 41 3 1 626 dia amp T ints Unit mm in S NT564 Revision 2010 June CO 28 2011 M37 M56 DESCRIPTION lt SYSTEM DESCRIPTION gt VK56VD SYSTEM DESCRIPTION DESCRIPTION Engine Cooling System
23. connect hose and clamp securely then check for leakage using the radi ator cap tester commercial service tool and the radiator cap tester adapter commercial service tool REMOVAL 1 Remove following parts Engine undercover using a power tool Front engine cover Refer to EM 182 Exploded View Air duct inlet Refer to EM 184 Exploded View Reservoir tank Refer to CO 39 Exploded View Loosen water pump pulley mounting bolts Remove drive belt Refer to EM 176 Removal and Installation Remove water pump pulley Drain engine coolant from drain plugs on radiator and cylinder block Refer to CO 33 Draining and EM CAUTION Perform this step when engine is cold Never spill engine coolant on drive belt 6 Remove water pump Refer to CO 45 Exploded View Engine coolant will leak from cylinder block so have a receptacle ready under vehicle CAUTION Gr 3x ON Revision 2010 June CO 45 2011 M37 M56 WATER PUMP lt REMOVAL AND INSTALLATION gt VK56VD e Handle the water pump vane so that it does not contact any other parts Never disassemble water pump INSTALLATION Install in the reverse order of removal n S pect i O n INFOID 0000000005984856 INSPECTION AFTER REMOVAL e Visually check that there is no significant dirt or rusting on water pump body and vane A e Check there is no slack in vane shaft and that it turns smoothly when rotated by hand If anything is found
24. core support ornament radiator core support center Refer to EXT 13 Exploded View Horn Refer to HRN 6 Exploded View 2 Remove condenser pipe assembly Refer to HA 40 Exploded View 3 Drain engine coolant from radiator Refer to CO 8 Draining CAUTION Perform this step when the engine is cold Never spill engine coolant on drive belt 4 Disconnect A T fluid cooler hoses from radiator Install blind plug to avoid leakage of A T fluid 5 Remove radiator hoses upper and lower and reservoir tank hose CAUTION Be careful not to allow engine coolant to contact drive belt Never loosen radiator water inlet pipe mounting screw A if loosened replace radiator 1 2 Radiator water inlet pipe JPBIA1832ZZ 6 Remove cooling fan assembly Refer to CO 17 Exploded View CAUTION Never damage or scratch radiator core when removing 7 Rotate two radiator upper mount brackets 90 degrees in direc tion as shown in the figure and remove them 1 Radiator upper mount bracket A Turn 90 counterclockwise JPBIA3166ZZ 8 Remove condenser 9 Remove radiator as follows CAUTION Be careful not to damage radiator core Revision 2010 June CO 14 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VQ37VHR a Lift up and pull the radiator 1 forward and then remove the mounting rubber lower 3 from the radiator core support 2 a Vehicle front JPBIAO106ZZ INSTALLATION
25. d tighten them Refer to EM 81 Set ting 3 Checkthat each hose clamp has been firmly tightened 4 Remove air relief plug 1 on radiator left side A Vehicle front JPBIA3167ZZ 5 Fill up the radiator with cooling water Pour engine coolant through engine coolant filler neck slowly of less than 2 0 2 1 8 US qt 1 3 4 Imp qt a minute to allow air in system to escape Use Genuine NISSAN Long Life Antifreeze Coolant or equivalent mixed with water distilled or demineralized Refer to MA 12 Fluids and Lubricants Engine coolant capacity Refer to CO 26 With reservoir tank at Periodical Maintenanc MAX level e Specification FITKA Reservoir tank engine coolant capacity Refer to CO 26 At MAX level Periodical Maintenance Specification A MAX B MIN 6 When engine coolant overflows air relief hole on radiator install air relief plug with new O ring Tightening torque Refer to CO 13 Exploded View JPBIAO102ZZ 7 Refill reservoir tank to MAX level line with engine coolant Install air cleaner case LH and air duct inlet Refer to EM 29 Exploded View 9 Install radiator cap eo Revision 2010 June CO 9 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VQ37VHR 10 11 12 13 14 a b c d e Flu 1 D Qo Oe gr Warm up engine until opening thermostat Standard for warming up time is approximately 10 minutes a
26. e is cold Never spill engine coolant on drive belts Disconnect A T fluid cooler hoses from radiator Install blind plug to avoid leakage of A T fluid Remove radiator hoses upper and lower and reservoir tank hose CAUTION Be careful not to allow engine coolant to contact drive belts Never loosen radiator water inlet pipe mounting screw A If loosened replace radiator 1 2 Radiator water inlet pipe JPBIA1832ZZ Rotate two radiator upper mount brackets 90 degrees in direc tion as shown in the figure and remove them 1 Radiator upper mount bracket A Turn 90 counterclockwise JPBIA31662Z Remove radiator as per the following CAUTION Be careful not to damage radiator core Revision 2010 June CO 40 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VK56VD a Lift up and pull the radiator 1 forward and then remove the mounting rubber lower 3 from the radiator core support 2 a Vehicle front JPBIAO106ZZ INSTALLATION Note the following and install in the reverse order of removal CAUTION Use genuine mounting bolts for the cooling fan assembly and strictly observe the tightening torque Breakage prevention for radiator NOTE Insert the radiator hose 1 all the way to the stopper 2 or by 33 mm 1 30 in hose without a stopper JSBIA0238GB Unit mm in A Radiator side B Engine side
27. er and reinstall radiator cap Wi 1 2 N m 0 12 kg m 11 in Ib Run the engine and warm it up to normal operating temperature Rev the engine two or three times under no load Stop the engine and wait until it cools down Drain water from the system Refer to CO 33 Draining Repeat steps 1 through 7 until clear water begins to drain from radiator Check that the reservoir tank cap is tightened DD Jo om P Revision 2010 June CO 36 2011 M37 M56 RADIATOR lt PERIODIC MAINTENANCE gt VK56VD RADIATOR RADIATOR CAP RADIATOR CAP Inspection INFOID 0000000005904645 Check valve seat of radiator cap Check if valve seat A is swollen to the extent that the edge of the metal plunger B cannot be seen when watching it vertically from the top Check if valve seat has no soil and damage JPBIA0108ZZ Pull negative pressure valve to open it and check that it close completely when released Check that there is no dirt or damage on the valve seat of radiator cap negative pressure valve Check that there are no unusualness in the opening and closing conditions of negative pressure valve SMA967B Check radiator cap relief pressure When connecting radiator cap to the radiator cap tester commer cial service tool and the radiator cap tester adapter commercial service tool A apply engine coolant to the cap seal surface Standard and limit Refer to CO 50 Radiator JPBIAO109ZZ Replace radia
28. ere it does not interfere with the pipe bulge When inserting water outlet pipe and water bypass pipe into water outlet apply neutral detergent to O ring CAUTION Never allow water outlet rear to nip O rings when installing water outlet pipe and water bypass pipe n S p e ct i O n INFOID 0000000005984832 INSPECTION AFTER INSTALLATION Check that the reservoir tank cap is tightened Check for leakage of engine coolant using the radiator cap tester adapter and the radiator cap tester com mercial service tool Refer to CO 8 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant Revision 2010 June CO 25 2011 M37 M56 lt SERVICE DATA AND SPECIFICATIONS SDS SERVICE DATA AND SPECIFICATIONS SDS SERVICE DATA AND SPECIFICATIONS SDS Periodical Maintenance Specification ENGINE COOLANT CAPACITY APPROXIMATE Engine coolant capacity With reservoir tank MAX level SERVICE DATA AND SPECIFICATIONS SDS VQ37VHR INFOID 0000000005984833 Unit US qt Imp qt 8 4 8 7 8 7 3 8 Reservoir tank engine coolant capacity At MAX level Radiator Cap relief pressure Standard 0 8 7 8 3 4 INFOID 0000000005984834 Unit kPa kg cm psi 122 3 151 7 1 2 1 5 18 22 Limit 107 1 1 16 Leakage testing pressure Thermostat Thermostat 157 1 6 23 INFOID 0000000005984835 Standard Valve opening tem
29. ertain types of collision This system includes seat belt switch inputs and dual stage front air bag modules The SRS system uses the seat belt switches to determine the front air bag deployment and may only deploy one front air bag depending on the severity of a collision and whether the front occupants are belted or unbelted Information necessary to service the system safely is included in the SRS AIR BAG and SEAT BELT of this Service Manual WARNING To avoid rendering the SRS inoperative which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation all maintenance must be performed by an authorized NISSAN INFINITI dealer Improper maintenance including incorrect removal and installation of the SRS can lead to personal injury caused by unintentional activation of the system For removal of Spiral Cable and Air Bag Module see the SRS AIR BAG Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual SRS wiring harnesses can be identified by yellow and or orange harnesses or har ness connectors PRECAUTIONS WHEN USING POWER TOOLS AIR OR ELECTRIC AND HAMMERS WARNING When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running DO NOT use air or electric power tools or strike near the sensor s with a hammer Heavy vibration could activate the
30. hing is found repair or replace damaged parts D ral n l n d INFOID 00000000059848 12 WARNING To avoid being scalded never change engine coolant when the engine is hot e Wrap a thick cloth around radiator cap and carefully remove radiator cap First turn radiator cap a quarter of a turn to release built up pressure Then turn radiator cap all the way Never spill engine coolant on drive belt 1 Open radiator drain plug 1 at the bottom of radiator and then remove radiator cap A o A Radiator drain plug hole C 3 Vehicle front N i When draining all of engine coolant in the system open water drain plugs on cylinder block Refer to EM 81 Setting JPBIA31692Z 2 Remove reservoir tank if necessary and drain engine coolant and clean reservoir tank before installing Revision 2010 June CO 8 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VQ37VHR 3 Check drained engine coolant for contaminants such as rust corrosion or discoloration If contaminated flush the engine cooling system Refer to CO 10 Flushing Refi i n d INFOID 0000000005984813 1 Remove air cleaner case LH and air duct inlet Refer to EM 29 Exploded View 2 Install reservoir tank if removed and radiator drain plug CAUTION Be sure to clean drain plug and install with new O ring Tightening torque Refer to CO 13 Exploded View If water drain plugs on cylinder block are removed close an
31. ing chain tensioner primary 2 Water pump 3 O ring 4 O ring Identify with light blue paint mark Apply engine coolant Refer to GlI 4 Components for symbols in the figure A Identify with yellow paint mark Re m oval a n d n stal ati O n INFOID 0000000005984825 CAUTION When removing water pump assembly be careful not to get engine coolant on drive belt e Water pump cannot be disassembled and should be replaced as a unit After installing water pump connect hose and clamp securely then check for leakage using the radi ator cap tester and the radiator cap tester adapter commercial service tool REMOVAL Remove engine cover Refer to EM 27 Exploded View Release the fuel pressure Refer to EC 161 Work Procedure Disconnect the battery cable from the negative terminal Remove air duct and air cleaner case assembly RH and LH Refer to EM 29 Exploded View Remove reservoir tank Refer to CO 13 Exploded View Separate engine harness removing their brackets from front timing chain case Remove engine undercover with power tool Drain engine oil Refer to CO 8 Draining CAUTION Perform this step when the engine is cold Never spill engine oil on drive belt 9 Drain engine coolant from radiator Refer to CO 8 Draining CAUTION Perform this step when the engine is cold Never spill engine coolant on drive belt 10 Remove cooling fan assembly Refer to CO 17 Exploded View 11 Rem
32. l with cooling water and repeat the steps from Step 8 14 Refill reservoir tank to MAX level line with engine coolant 15 Check cooling system for leakage with engine running 16 Check flow noise according to the following steps CAUTION To check flow noise turn OFF the radio and close the windows doors and the hood a Allow the engine to become cold approximately 50 C or less b Start the engine maintain 1000 rpm for approximately 30 seconds and increase the engine speed from 1000 to 3000 rpm Repeat this cycle three times c Check that flow noise can be heard from the heater core during the Step b operation d If flow noise can be heard repeat from Step 12 of Refilling to Step c of Flow Noise Verification Method e Checkthat the reservoir tank cap is tightened F u S h i n d INFOID 0000000005984844 1 Install reservoir tank if removed and radiator drain plug CAUTION Be sure to clean drain plug and install with new O ring fg 1 2 N m 0 12 kg m 11 in Ib If water drain plug on cylinder block is removed close and tighten it Refer to EM 274 Disassem bly and Assembly Revision 2010 June CO 35 2011 M37 M56 ENGINE COOLANT lt PERIODIC MAINTENANCE gt VK56VD 2 Remove air relief plug 1 on radiator lt m Vehicle front JPBIA3167ZZ 3 Fill water inlet with water until water spills from the air relief holes then close air relief plugs Fill water inlet and reservoir tank with wat
33. mperatures It should seat tightly 2 Check valve operation Thermostat Standard Refer to CO 26 Thermostat If the malfunctioning condition when valve seating at ordinary room temperature or measured values are out of the standard replace water inlet and thermostat assembly SLC949A INSPECTION AFTER INSTALLATION Check that the reservoir tank cap is tightened Check for leakage of engine coolant using the radiator cap tester adapter and the radiator cap tester com mercial service tool Refer to CO 8 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant Revision 2010 June CO 23 2011 M37 M56 WATER OUTLET AND WATER PIPING lt REMOVAL AND INSTALLATION gt VQ37VHR WATER OUTLET AND WATER PIPING Exploded View INFOID 0000000005984830 SEC 210 211 253 1 hs 9 9 0 0 92 80 Ze B 1 ES 11 0 1 1 8 Se T2 11 0 1 1 8 JPBIA2339GB 1 Clamp 2 Water hose 3 Harness bracket 4 Engine coolant temperature sensor 5 Heater hose 6 Clamp 7 Water outlet rear 8 Gasket 9 O ring 10 Water outlet pipe 11 Water outlet front 12 Radiator cap 13 Clamp 14 Radiator hose upper 15 Gasket 16 Heater pipe 17 Clamp 18 Water hose 19 Water bypass pipe 20 Clamp 21 Water hose 22 Heater hose 23 O ring A To electric throttle control actuator B To heater core C To radiator D To electric throttle control actuator Refer to Gl 4 Compone
34. nance Specification ENGINE COOLANT CAPACITY APPROXIMATELY Engine coolant capacity With reservoir tank MAX level SERVICE DATA AND SPECIFICATIONS SDS VK56VD INFOID 0000000005984860 Unit US qt Imp qt 10 9 11 4 8 9 5 8 Reservoir tank engine coolant capacity At MAX level Radiator Cap relief pressure Standard 0 8 7 8 3 4 INFOID 0000000005984861 Unit kPa kg cm psi 122 3 151 7 1 2 1 5 18 22 Limit 107 1 1 16 Leakage testing pressure Thermostat Thermostat 157 1 6 23 INFOID 0000000005984862 Standard Valve opening temperature 82 C 180 F Maximum valve lift 10 0 mm 95 C 0 394 in 203 F Valve closing temperature Revision 2010 June CO 50 77 C 171 F 2011 M37 M56
35. nsertion parts of the water connector and heater pipe into the installation holes n S pect O n INFOID 0000000005984859 INSPECTION AFTER REMOVAL Check that valve in thermostat is completely closing at normal temperature Revision 2010 June CO 48 2011 M37 M56 WATER INLET AND THERMOSTAT ASSEMBLY lt REMOVAL AND INSTALLATION gt VK56VD Place a thread A so that it is caught in the valve of the thermostat Immerse fully in a container filled with water Heat while stirring The valve opening temperature is the temperature at which the valve opens and falls from the thread After checking the maximum valve lift lower the water temperature and check the valve closing temperature Thermostat Standard Refer to CO 50 Thermostat If the malfunctioning condition when valve seating at ordinary room temperature or measured values are out of the standard replace thermostat JPBIA2319ZZ INSPECTION AFTER INSTALLATION Check that the reservoir tank cap is tightened Check for leakage of engine coolant using the radiator cap tester adapter commercial service tool and the radiator cap tester commercial service tool Refer to CO 33 Inspection Start and warm up the engine Visually check that there is no leakage of engine coolant Revision 2010 June CO 49 2011 M37 M56 lt SERVICE DATA AND SPECIFICATIONS SDS SERVICE DATA AND SPECIFICATIONS SDS SERVICE DATA AND SPECIFICATIONS SDS Periodical Mainte
36. nts for symbols in the figure Re m oval a nd n stal lat i O n INFOID 0000000005984831 REMOVAL 1 Remove engine cover Refer to EM 27 Exploded View 2 Remove reservoir tank Refer to CO 13 Exploded View 3 Remove oil level gauge and guide Refer to EM 84 2WD Exploded View 2WD models or EM 87 AWD Exploded View AWD models 4 Remove air duct and air cleaner case assembly RH and LH Refer to EM 29 Exploded View 5 Remove engine undercover with power tool 6 Drain engine coolant from radiator drain plug at the bottom of radiator Refer to CO 8 Draining Revision 2010 June CO 24 2011 M37 M56 WATER OUTLET AND WATER PIPING lt REMOVAL AND INSTALLATION gt VQ37VHR CAUTION Perform this step when the engine is cold Never spill engine coolant on drive belts 7 Remove radiator hose upper and heater hose 8 Separate engine harness removing their bracket from water outlet rear 9 Remove engine coolant temperature sensor if necessary CAUTION Be careful not to damage engine coolant temperature sensor 10 Remove heater pipe water bypass pipe and water outlet pipe 11 Remove water outlet rear if necessary NOTE Removing engine assembly is required Refer to EM 71 2WD Exploded View 2WD models or EM 76 AWD Exploded View AWD models INSTALLATION Note the following and install in the reverse order of removal Securely insert each hose and install clamp at a position wh
37. ose lower 7 Radiator hose upper 8 Drain plug 9 O ring 10 Water drain hose 11 O ring 12 Air relief plug 13 Clamp 14 AST fluid cooler hose 15 A T fluid cooler hose 16 Reservoir tank cap 17 Reservoir tank 18 Reservoir tank hose 19 Clamp 20 Reservoir tank hose 21 Grommet 22 Cooling fan assembly A Totransmission B To water inlet and thermostat assembly C To water outlet Refer to Gl 4 Components for symbols in the figure Removal and Installation EE REMOVAL WARNING Revision 2010 June CO 39 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VK56VD Never remove radiator cap when engine is hot Serious burns could occur from high pressure engine coolant escaping from water inlet Wrap a thick cloth around the cap Slowly turn it a quarter of a turn to release built up pressure Carefully remove radiator cap by turning it all the way 1 6 7 Remove the following parts Engine under cover using a power tool Front engine cover Refer to EM 182 Exploded View Air cleaner case Refer to EM 184 Exploded View Air duct inlet Refer to EM 186 Exploded View Hood lock stay assembly and horn Refer to DLK 169 Exploded View and HRN 6 Exploded View Reservoir tank Radiator core support Remove condenser pipe assembly Refer to HA 40 Exploded View Drain engine coolant from radiator Refer to CO 33 Draining CAUTION Perform this step when the engin
38. ove radiator hose upper and lower Refer to CO 13 Exploded View 12 Remove front timing chain case Refer to EM 52 Exploded View ou X Qr qo mc Revision 2010 June CO 19 2011 M37 M56 lt REMOVAL AND INSTALLATION gt VQ37VHR 13 Remove timing chain tensioner primary 3 as follows a Remove lower mounting bolt 1 b Loosen upper mounting bolt 2 slowly and then turn chain ten sioner primary on the upper mounting bolt so that plunger 4 is fully expanded NOTE Even if plunger is fully expanded it is not dropped from the body of timing chain tensioner primary JPBIA0085ZZ c Remove upper mounting bolt and then remove timing chain tensioner primary 14 Remove water pump as follows a Remove three water pump mounting bolts Secure a gap between water pump gear and timing chain by turning crankshaft counterclockwise until timing chain looseness on water pump sprocket becomes maxi mum b Screw M8 bolts A pitch 1 25 mm 0 049 in length approx 50 mm 1 97 in into water pumps upper and lower mounting bolt holes until they reach timing chain case Then alternately tighten each bolt for a half turn and pull out water pump 1 CAUTION Pull straight out while preventing vane from contacting socket in installation area e Remove water pump without causing sprocket to contact timing chain c Remove M8 bolts and O rings from water pump CAUTION JPBIAOI11ZZ Never disassemble water pump
39. perature 82 C 180 F Maximum valve lift 8 6 mm 95 C 0 339 in 203 F Valve closing temperature Revision 2010 June CO 26 77 C 171 F 2011 M37 M56 PRECAUTIONS lt PRECAUTION gt VK56VD PRECAUTION PRECAUTIONS Precaution for Supplemental Restraint System SRS AIR BAG and SEAT BELT PRE TENSIONER INFOID 0000000006466764 The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE TENSIONER used along with a front seat belt helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision This system includes seat belt switch inputs and dual stage front air bag modules The SRS system uses the seat belt switches to determine the front air bag deployment and may only deploy one front air bag depending on the severity of a collision and whether the front occupants are belted or unbelted Information necessary to service the system safely is included in the SRS AIR BAG and SEAT BELT of this Service Manual WARNING To avoid rendering the SRS inoperative which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation all maintenance must be performed by an authorized NISSAN INFINITI dealer Improper maintenance including incorrect removal and installation of the SRS can lead to personal injury caused by unintentional activation of the system For removal of Spiral Cable
40. t 3 000 rpm Check thermostat opening condition by touching radiator hose lower to see a flow of warm water CAUTION Watch water temperature gauge so as not to overheat engine Stop the engine and cool down to less than approximately 50 C 122 F Cool down using fan to reduce the time If necessary refill radiator up to filler neck with engine coolant Remove the radiator cap to check the fluid level If the fluid level is low refill with cooling water and repeat the steps from Step 7 Refill reservoir tank to MAX level line with engine coolant Check cooling system for leakage with engine running Check flow noise according to the following steps CAUTION To check flow noise turn OFF the radio and close the windows doors and the hood Allow the engine to become cold approximately 50 C or less Start the engine maintain 1000 rpm for approximately 30 seconds and increase the engine speed from 1000 to 3000 rpm Repeat this cycle three times Check that flow noise can be heard from the heater core during the Step b operation If flow noise can be heard repeat from Step 12 of Refilling to Step c of Flow Noise Verification Method Check that the reservoir tank cap is tightened S h l n g INFOID 00000000059848 14 Install reservoir tank if removed and radiator drain plug CAUTION Be sure to clean drain plug and install with new O ring Tightening torque Refer to CO 13 Exploded View If water dr
41. t core support from being damaged Disassembly and Assembly INFOID o000000005954822 DISASSEMBLY 1 Disconnect harness from cooling fan control module 2 Remove cooling fan control module from cooling fan assembly CAUTION Handle carefully to avoid dropping and shocks 3 Remove cooling fan mounting nuts and then remove the cooling fan RH and LH 4 Remove fan motors 1 and 2 Revision 2010 June CO 17 2011 M37 M56 COOLING FAN lt REMOVAL AND INSTALLATION gt VQ37VHR ASSEMBLY Note the following and assemble in the reverse order of disassembly CAUTION RH and LH cooling fans are different Be careful not to misassemble them Install each fan in the following position Right side 9 blades Left side 11 blades Secure the harness tightly to the fan shroud to prevent the fan rotation area from being loose n S pect i O n INFOID 0000000005984823 INSPECTION AFTER REMOVAL Check that fan motors operate normally NOTE Cooling fans are controlled by cooling fan control module For details refer to EC 50 COOLING FAN CON TROL System Diagram INSPECTION AFTER DISASSEMBLY Cooling Fan Inspect cooling fan for crack or unusual bend If anything is found replace cooling fan Revision 2010 June CO 18 2011 M37 M56 WATER PUMP lt REMOVAL AND INSTALLATION gt VQ37VHR WATER PUMP Exploded View INFOID 0000000005984824 SEC 130 135 210 fg 8 1 0 83 72 OS JPBIA1357GB 1 Tim
42. tor cap if there is an unusualness related to the above three CAUTION When installing radiator cap thoroughly wipe out the water inlet filler neck to remove any waxy resi due or foreign material RADIATOR RA D IATO H H n S pe cti O n INFOID 0000000005984846 Check radiator for mud or clogging If necessary clean radiator as per the following Be careful not to bend or damage radiator fins When radiator is cleaned without removal remove all surrounding parts such as radiator cooling fan assem bly and horns Then tape harness and connectors to prevent water from entering 1 Apply water by hose to the back side of the radiator core vertically downward 2 Apply water again to all radiator core surfaces once per minute Revision 2010 June CO 37 2011 M37 M56 RADIATOR lt PERIODIC MAINTENANCE gt VK56VD 3 Stop washing if any stains no longer flow out from radiator 4 Blow air into the back side of radiator core vertically downward Use compressed air lower than 490 kPa 5 kg cm 71 psi and keep distance more than 30 cm 11 8 in 5 Blow air again into all the radiator core surfaces once per minute until no water sprays out Revision 2010 June CO 38 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VK56VD REMOVAL AND INSTALLATION RADIATOR Exploded View SEC 214 JPBIA3735GB 1 Upper mount bracket 2 Mounting rubber upper 3 Radiator 4 Mounting rubber lower 5 Clamp 6 Radiator h
43. ve Check radiator cap relief pressure Standard and limit Refer to CO 26 Radiator When connecting radiator cap to the radiator cap tester and the radiator cap tester adapter commercial service tool A apply engine coolant to the cap seal surface JPBIAO109ZZ Replace radiator cap if there is an unusualness related to the above three CAUTION When installing radiator cap thoroughly wipe out the water outlet front filler neck to remove any waxy residue or foreign material RADIATOR RA D IATO H S n S pe cti O n INFOID 0000000005984816 Check radiator for mud or clogging If necessary clean radiator as follows 1 2 3 4 Be careful not to bend or damage radiator fins When radiator is cleaned without removal remove all surrounding parts such as radiator cooling fan assem bly and horns Then tape harness and connectors to prevent water from entering Apply water by hose to the back side of the radiator core vertically downward Apply water again to all radiator core surfaces once per minute Stop washing if any stains no longer flow out from radiator Blow air into the back side of radiator core vertically downward Revision 2010 June CO 11 2011 M37 M56 RADIATOR lt PERIODIC MAINTENANCE gt VQ37VHR Use compressed air lower than 490 kPa 5 kg cm 71 psi and keep distance more than 30 cm 11 8 in 5 Blow air again into all the radiator core surfaces once per minute until no water sprays out Re
44. ve the cooling fan RH and LH Revision 2010 June CO 43 2011 M37 M56 COOLING FAN lt REMOVAL AND INSTALLATION gt VK56VD 4 Remove fan motors 1 and 2 ASSEMBLY Note the following and assemble in the reverse order of disassembly CAUTION RH and LH cooling fans are different Be careful not to misassemble them Install each fan in the following position Right side 9 blades Left side 11 blades Secure the harness tightly to the fan shroud to prevent the fan rotation area from being slack n S pect i O n INFOID 0000000005984853 INSPECTION AFTER REMOVAL Check that fan motors operate normally NOTE Cooling fans are controlled by cooling fan control module For details refer to EC 575 COOLING FAN CON TROL System Diagram INSPECTION AFTER DISASSEMBLY Cooling Fan Inspect cooling fan for crack or unusual bend e If anything is found replace cooling fan Revision 2010 June CO 44 2011 M37 M56 WATER PUMP lt REMOVAL AND INSTALLATION gt VK56VD WATER PUMP Exploded View INFOID 0000000005984854 SEC 210 Sg 9 8 1 0 87 JPBIA2316GB 1 Water pump pulley 2 Water pump 3 Gasket Refer to Gl 4 Components for symbols in the figure Removal and Installation INFOID O000000005954855 CAUTION When removing water pump assembly be careful not to get engine coolant on drive belts e Water pump cannot be disassembled and should be replaced as a unit After installing water pump
45. vision 2010 June CO 12 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VQ37VHR REMOVAL AND INSTALLATION RADIATOR Exploded View SEC 214 JPBIA3735GB 1 Upper mount bracket 2 Mounting rubber upper 3 Radiator 4 Mounting rubber lower 5 Clamp 6 Radiator hose lower 7 Radiator hose Upper 8 Drain plug 9 O ring 10 Water drain hose 11 O ring 12 Air relief plug 13 Clamp 14 A T fluid cooler hose 15 A T fluid cooler hose 16 Reservoir tank cap 17 Reservoir tank 18 Reservoir tank hose 19 Clamp 20 Reservoir tank hose 21 Grommet 22 Radiator cooling fan assembly A Totransmission B To water inlet and thermostat assembly C To water outlet Refer to Gl 4 Components for symbols in the figure Removal and Installation EE REMOVAL WARNING Revision 2010 June CO 13 2011 M37 M56 RADIATOR lt REMOVAL AND INSTALLATION gt VQ37VHR Never remove radiator cap when engine is hot Serious burns could occur from high pressure engine coolant escaping from water inlet front Wrap a thick cloth around the cap Slowly turn it a quarter of a turn to release built up pressure Carefully remove radiator cap by turning it all the way 1 Remove the following parts Engine under cover with power tool Engine cover Refer to EM 27 Exploded View Air cleaner case RH and LH and air duct inlet Refer to EM 29 Exploded View e Reservoir tank Refer to CO 13 Exploded View Radiator

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