Hooker 2253-1 Header Installation Instructions
Contents
1. ER eHEADERS A Holley Performance Brand 2253HKR 2253 1HKR amp 2253 2HKR Instruction Sheet To Complete Off Highway System Use Part 16723HKR or 16723 1HKR Y Pipe WARNING Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat Hooker recommends using a cast iron exhaust manifold or old headers to break in new engines to avoid coating damage Please call tech service at 270 781 9741 or 1 866 GOHOLLEYfor additional information regarding ceramic coated exhaust products BEFORE STARTING Your vehicle must be raised a minimum of 36 inches A floor hoist is ideal If no hoist is available we strongly urge the use of axle stands as a safety measure CAUTION Your car should not be supported on a bumper jack prior to installing headers take the time to make a careful and complete inspection of both engine and transmission mounts Replace them if they look worn or damaged otherwise this may affect the header fitting into your vehicle properly HELPFUL HINTS FOR HEADER INSTALLATION AND MAINTENANCE 1 Verify the header part number with the part number on the box and invoice Unless otherwise noted Hooker Headers are designed to fit without modifying the header denting cutting DO NOT modify the header Call Holley s Technical Department at 270 781 9741 3 Unless ot2. gen sensors Mark them for their location so they may reinstalled in their proper location accordingly 4 Remove the drive shaft safety brace 5 Remove the Y pipe from the vehicle IMPORTANT DO NOT DISMOUNT THE MOTOR AND DO NOT REMOVE THE STARTER THE HEADERS WILL INSTALL WITH THESE TWO 2 ITEMS BOLTED IN LOCATION DISASSEMBLY OF THE LEFT SIDE 1 From below remove the left side catalytic converter 2 Remove the oil passage diverter plate that is located just above the oil filter Approximately 1 2 pint of oil will drain This plate may now be removed or just prior to the actual installation of the left side header Take care not to let any dirt or foreign matter enter the open oil passages Disconnect and remove the left side A I R tube assembly Disconnect and remove the spark plug wires Remove the spark plugs Remove the left side exhaust manifold O Or Fe Oo 7 Point the steering wheel straightforward and turn the key to the lock position and remove the key Remove the steering shaft Please take note of G M Pt Notice 26068010 which states To help avoid damage and possible malfunction of the air bag do not rotate the steering shaft with the steering shaft disconnected See the G M service manual before disconnecting 8 Remove the small left side heat shield deflector DISASSEMBLY OF THE RIGHT SIDE Disconnect and remove the right side A I R tube assembly Unbolt and remove the oil dipstick Disconnect and
3. her wise noted Hooker Headers are designed to fit with original equipment i e Oil pan cylinder heads mounts bell housings starters etc 4 When using Hooker Headers it is recommended to use Hooker gaskets for correct port match When using other than the recommended Hooker gaskets match the gaskets to the head ports for a good seal Heat wrapping is not recommended because it will prematurely fatigue the header Headers that are subject to extreme conditions mud road salt etc should be cleaned on a regular basis to help prevent corrosion When installing headers use anti seize on header bolts and Y pipe bolts NON HEADER INSTALLATION PROCEDURE DISASSEMBLY amp ASSEMBLY INSTRUCTIONS PLEASE READ THOROUGHLY amp CAREFULLY SPECIAL COMPONENTS NEEDED FOR ASSEMBLY 1 Oxygen Sensor Simulator May be purchased from the following SLP Part 31036 Phone 732 349 2109 Mid America Designs Inc Part 609132 Phone 217 347 5591 2 Oxygen Sensor Wire Extension s 2 each 28 Long Included with Header NOTE These Oxygen Sensor Wire Extensions are made long enough to use either the Oxygen Sensor with the 8 wire length or the Oxygen Sensor with the 12 wire length Any excess wire length after installation should be looped and secured into a non used and non heated cavity or pocket DISASSEMBLY 1 Disconnect the battery 2 Raise the car and support it with jack stands 3 Disconnect and remove the four 4 oxy
4. ill come in contact with the headers Check to ensure that no I s and r s heat shields come in contact with the headers Check to ensure that all emission A I R hoses are clamped properly Check to ensure that any and all electrical connections that were disconnected are properly reconnected Check to ensure that all oxygen sensor wires are looped and secured in a non used and non heated cavity or pocket NOTE Y PIPE PART NUMBER 16723HKR OR 16723 1HKR IS RECOMMENDED TO BE USED AND INSTALLED WITH THIS HEADER P N 2253HKR OR 2253 1HKR Reconnect the battery Start the car and check for leaks NOTARONA 2253HKR Instruction Sheet Revision Date 1 11 06
5. remove the spark plug wires Disconnect the EGR tube by removing the 2 two 8mm bolts DO NOT try to remove the tube Remove the spark plugs Remove the right side exhaust manifold DOT EON gt ASSEMBLY OF THE LEFT SIDE WITH HEADER NOTE Use anti seize on all header bolts and oxygen sensor threads 1 Insert the left side header through the chassis from below While inserting the header in the vehicle reinstall the oil passage diverter plate and tighten Take caution not to strip threads DO NOT overtighten From above install the gasket Using the supplied 8mm lock washers over the factory exhaust bolts start all the header bolts prior to tightening then evenly tighten all the header bolts to 20 25 ft Ibs Reinstall the steering shaft and tighten the bolt to factory specifications Reinstall the spark plugs and tighten Reinstall the spark plug wires Check to ensure that they do not contact the header Reinstall the left side A I R tube assembly Install the left side pre catalytic converter oxygen sensor into the left side header collector NOTE The oxygen sensor simulator needs to be installed according to directions supplied by the simulator manufacturer Use the 28 supplied extension to complete the simulator install on PREO O E NOTE These Oxygen Sensor Wire Extensions are made long enough to use either the Oxygen Sensor with the 8 wire length or the Oxygen Sensor with 12 wire length Any excess wire leng
6. th after installation should be looped and secured into a non used and non heated cavity or pocket 9 Reinstall the small left side heat shield deflector ASSEMBLY OF THE RIGHT SIDE WITH HEADER 1 Insert the right side header through chassis from below From above install the gasket 3 Using the supplied 8mm lock washers over the factory exhaust bolts start all the header bolts prior to tightening then evenly tighten all the header bolts to 20 25 ft Ibs Reinstall the spark plugs and tighten Reinstall the spark plug wires Check to ensure that they do not contact the header Reattach the EGR tube by reinstalling the 2 two 8mm bolts through the EGR plate Reinstall the dipstick and tighten the retainer bolt Reinstall the right side A I R tube assembly Install the right side pre catalytic converter oxygen sensor into the right side header collector NOTE The oxygen sensor simulator needs to be installed according to directions supplied by the simulator manufacture Use the 28 supplied extension to complete the simulator install COND NOTE These Oxygen Sensor Wire Extensions are made long enough to use either the Oxygen Sensor with the 8 wire length or the Oxygen Sensor with 12 wire length Any excess wire length after installation should be looped and secured into a non used and non heated cavity or pocket PRIOR TO FINISHING CHECK LIST Inspect the steering shaft for proper installation Check to ensure that no wires w
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