Part 2: Prep the Motor (ver. 0
Contents
1. into a separate bundle These will be connected to the BMW through an 8 pin connector 1998 Computer Temperature sender brown yellow Temperature sender brown violet Tach signal white wire from PCM C2 blue pin 35 AC request dk green white from PCM C1 red pin 47 Low oil level Brown white from PCM C1 red pin 41 Check engine Brown white from PCM C1 red pin 37 Generator status Small red wire that comes from the alternator Oil pressure New wire from oil pressure sending unit zarpa 1999 and newer computer i Temperature sender brown yellow Temperature sender brown violet Tach signal white wire from PCM C2 blue pin 10 AC request dk green white from PCM C2 blue pin 17 Low oil level Brown white from PCM C1 red pin 70 Check engine Brown white from PCM C2 blue pin 46 Generator status Red from PCM C2 blue pin 15 Oil pressure New wire from oil pressure sending unit Besar Nash Motorsports Page 15 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Two Wire Back Up Lights Connector 7 8 Wire Harness from BMW A M D E 8 Pin Connector Nash Motorsports Page 16 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Senaenn EET TI iii j Main PCM Bundle Main engine breakout 8 Wire Breakout Going to BMW Electrical Center Break out inside wire box JPG 8 wire breakout JPG Na2. Nash Motorsports BMW E36 LS1 Conversion Part 2 Rev 30Aug05 Prepare the LS Follow these instructions step by step and by the end your LS1 will be ready for marriage to your E36 bimmer While it is possible to complete this prep work in a day it is more realistic to plan on 2 3 good days to get everything ready It is best to print out these instructions in black and white Color is nice but it takes a long time and you will burn up a lot of ink If there are any questions please call am here to help and want your swap to be a fantastic experience Sincerely Mike Collins 586 943 6385 Nash Motorsports Page 1 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM In 1996 government regulations required all vehicles to be equipped with an emissions standard called onboard diagnostics 2 or OBD Il This standard requires the engine management system to perform many tests on the emissions systems to determine proper function One of the tests the PCM performs is the catalytic converter function This function is checked by comparing oxygen levels in the exhaust gas before the cat and then after the cat If the PCM determines the cat to be bad the vehicle will be placed in limp home mode Additionally the LS1 has a vehicle antitheft system VATS that requires the body computer to send an OK to start signal to the PCM In this swap we have made no attempt to have an OBD II emissions compliant vehic
3. The Old O2 sensor should not be connected for this test The 12V wire can be identified with a Voltmeter by probing the harness looking for a wire with 12V to 14V with respect to chassis ground when the Ignition key is on To find the ground wire s use an Ohmmeter or continuity tester to find which wires are connected to chassis ground The meter should read less then 4ohms or beep if using a continuity tester VATS O2 simulator module wires e Red 12V from ignition or O2 heater wire e Purple Simulated Oxygen sensor signal e Purple Simulated Oxygen sensor signal Note ether simulated O2 signal can be use with left or right when working with dual exhaust e Blue VATS signal wire to PCM normally a dark blue wire on the PCM on pin 25 or 30 of the red or pin 55 or 70 of the blue connector The Fuel Enable wire can also be found on the BCM s 10 pin blue connector 230 on pin E e Black Ground Connect to one or both ground wires that were previously connected to the O2 sensor or run a wire to chassis ground VATSiDual 02 Dual Exhaust 02 Heaters not needed ECM PCM VATS HTR 12v POSTCAT POSTCAT LJ 02 sensor VU 02 sensor We recommend connecting the wires by using insulated crimps or soldering and using appropriate insulation electrical tape or heat shrink tubing This module should be installed in a location that does not exceed 90 C or 194 F VATS Dual O2 Instructions jpg Nash Motorsp
4. about 2 feet of wire attached to the DLC 32 Pull DLC wires out of the harness so they exit the harness back near the PCM and can be combined with the main connector breakout O2 sensor wire VATS ire DLC wires Shown here as a seperate m breakout these can be scombined with the wires sin the connector breakout Main power breakout to connectors C100 C101 C105 Connector breakout JPG Nash Motorsports Page 14 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 33 Locate temperature gauge sending unit on the BMW motor This will have a brown violet and a brown yellow wire attached to it Remove this sensor and cut the wires leaving them as long as possible 34 At the rear of the the passenger side head there is a 12mm plug Remove this plug and install the BMW temperature gauge sending unit Note The sending unit is probably an m14 thread If so then the hole will have to be drilled out and tapped to m14 x 1 5 or have adapters available for 45 35 Install oil pressure sending unit into oil filter bracket The oil filter bracket is designed with a port to attach a sending unit This port needs to be drilled out and tapped using a 1 8 pipe tap 36 Attach sensor wire to oil pressure sending unit and rout wire up back of block and attach securely using tie straps Loose installl LH header to be sure wire has a minimum of 1 clearance to the header pipes 37 Find the following wires and break them out
5. d and cannot get to it with the motor is installed THAT S IT FOR LS1 PREP Nash Motorsports Page 20 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Revision History July 1 2006 Changed the length of the clutch line on the transmission from 10 to 8 Added picture of wire harness routing on top of intake Added pinout information for 1999 computers Added VATS information for 1999 computer Add header installation in the prep the motor section ot RON Nash Motorsports Page 21 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM
6. from Back Up light switch located on passenger side of transmission There is not enough room for the long back up light connector so wires need to be soldered to the switch terminals and 2 pin inline 15 connector installed To do this first trim away the connector shield to expose copper connector Then solder wires from new 2 pin inline connector to these terminals 16 Connect other side of inline connector to the backup light wires using crimp connectors Protect wires with shrink tube and wire loom TT Sat ie 7 J x a aii 2 A Nash Motorsports Page E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 5 17 Same for the AC clutch Disconnect AC clutch wire from compressor 18 Trim away shield on connector being very careful not to damage the ceramic housing as it is fragil 19 Solder wires from new 2 pin inline connector the AC compressor pins AC connector trimmed JPG Nash Motorsports Page 6 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 20 Attach other side of new 2 pin connector to the compressor wires using crimp connectors Be careful not to cross the wires Protect wires with shrink tube and wire loom AC Inline Connector JPG Nash Motorsports Page 7 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 22 Reroute backup light wires to exit the harness at the back of the motor on the driver side above the valve c
7. le As a result the LS1 PCM needs to either fooled into running or reprogrammed The PCM can be fooled into running by using a VATS dual O2 simulator This simulator will send an OK to start signal to the PCM and will send after cat O2 signal to the PCM that indicated proper cat function With these two systems fooled the LS1 will start and run in full power mode Using the VATS dual O2 simulator will not provide the PCM with information on the other emission systems that are disabled To the best of my knowledge the other systems being disabled will not put the PCM into limp home mode but will cause the PCM to throw a bunch of codes and set the check engine light The better solution is to have the PCM reprogrammed to eliminate checking systems that are no longer functional Doing this will allow the PCM the check the rest of the engine management systems for proper function and set the light only when needed Nash Motorsports Page 2 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Note In these instructions all references to pin locations on the LS1 connectors are for the f body computers There are two version of these computers 1998 or 1999 and newer If you are using a computer from a corvette of GTO you will have to reference the GM service manual to obtain wiring information 1 Remove factory motor mounts from side of motor 2 Install new motor mount struts and torque to 65 Nm 3 G
8. orts E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Nash Motorsports E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 28 29 If you are reprogramming your PCM then you can either remove the rear O2 wires or just leave them in the harness In the fcar wiring harness there is a large breakout near the PCM This breakout will have 3 connectors at the end These are connectors C100 C101 and C105 The wires in this breakout will be attached to the new electrical center This breakout will have to be see picture relocated in the harness to exit closer to the PCM Breakout contains rear 02 sensor wire VATS ire DLC wires Shown here as a seperate breakout these can be scombined with the wires sin the connector breakout ower Main power breakout to connectors C100 C101 C105 aes ALIT Page 12 Connector breakout JPG Nash Motorsports E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 30 Move the wiring harness that runs along the rear of the intake manifold to the top rear edge of the intake When the motor is installed there is not enough room for the wiring harness to remain behind intake manifold fp Nash Motorsports Page 13 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 31 Locate the Data Link Connector DLC and cut the wires going to the DLC leaving
9. over 23 Open the engine harness and reroute the driver side forward O2 sensor down the back of the motor and back near the shifter Protect O2 sensor wires with wire loom 24 Reroute passenger side forward O2 sensor down back of motor and back near the backup light switch 25 Always protect all electrical wires with wire loom 26 If you are using Cats then you will have to reroute the rear O2 sensors or add extensions to move them into the correct location for your rear O2 27 If you are using the Dual O2 VATS simulator then pull the rear O2 sensor wires out of the bundle all the way back to the PCM The rear sensor wires will be connected to the simulator which will be mounted next to the PCM Follow the attached directions to wire the simulator 28 Also pull the VATS wire blue wire connecter to PCM C1 red pin 11 on 98 f car computer C2 blue pin 30 on 1999 and newer computers Nash Motorsports Page 8 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM The following directions explain how to determine power and ground however in all applications have seen the 12v is always the pink wire and ground is always the black wire The signal wire is purple or purple white and signal ground is tan or tan white Part rep the LS1 Last printed 7 1 2006 6 07 00 PM Connecting the new VATS DO2SIM module wires to your harness First you must determine which wires are Signal 12V Power and Ground
10. rind shifter as shown in picture J Grind away the shifter tower here What is shown is a minimum that must be removed Removing more ill give clearance to he flasher switch Shifter tower JPG Nash Motorsports Page 3 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Remove shifter from transmission Remove accessory drive belt Remove alternator Remove exhaust manifolds but save gaskets For 1997 2001 motors remove EGR plumbing EGR valve can be removed from intake but hole will need to be plugged Remove AIR plumbing 0 Cut transmission clutch line to 8 and install 4 female end fitting onto steel braided clutch line To keep the steel braid from fraying wrap the clutch line with several layers of electrical tape at the cut location and use a die grinder with cutoff wheel and cut through the tape and clutch line SOONDOF 11 Install headers and check fit Some motors have a plastic shield near the starter that will need to be cut away to allow room for the headers Torque header bolts to 35 N m 12 Factory exhaust manifold gaskets are excellent To he positive there is no leaks recommend applying a coating of high temperature RTV to both sides of the gasket prior to header installation 13 Wrap starter in thermal protection blanket Nash Motorsports Page 4 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 14 Remove electrical connector
11. sh Motorsports Page 17 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 38 Use tie straps to attach 1 wire loom to bottom side of PCM see picture d 4 Use tie strap going around aoe PCM and through wire loom o attach loom to PCM PUUUE UPTO Pe Ld gt i o ENG Attach 1 wire loom to bottom side of a he PCM Run tie straps through center of p r ire loom and secure in notches in MAN PCM In this view wiring harness exits ee on left side e Wire loom on PCM JPG Nash Motorsports E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM Page 18 39 Use tubing cutter to remove the taper on the fuel rail inlet Tighten compression fitting onto fuel rail Do not attach fuel line yet Koj oe r VA HAN AE t i VEL Wii Pit TT eae AYALA sAN eer M D l Cut tapered end off the fuel NS rail Use 3 8 compresion to N uel Attach to Rail jpg Nash Motorsports Page 19 E36 LS1 Conversion Part 2 Prep the LS1 Last printed 7 1 2006 6 07 00 PM 40 Brake booster vacuum port is located on the rear of the intake manifold This port needs to be pulgged since we are running hydroboost The easiest way to plug this port is to run a tap on the inside of the plastic fitting and screw a bolt into the port Apply silicon sealer to the bolt before installing think an m12 tap works but it might be an m10 My notes don t tell me what size use
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