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Cylinder Head (j37a4) Acura TL IV

Mechanical 164 illustrations ~9543 words

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Scheme 180: Special Tools
Scheme 180: Special Tools

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Scheme 181: Component Location Index
Scheme 181: Component Location Index

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Scheme 183: FRONT
Scheme 183: FRONT

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Scheme 184: REAR
Scheme 184: REAR

Engine Compression Inspection

Note. After the inspection, you must reset the powertrain control module (PCM) Otherwise, the PCM will continue to stop the fuel injectors from operating

  1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  2. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )
  3. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
  4. Make sure the HDS communicates with the vehicle and the PCM If it does not communicate, troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__dlc-circuit-troubleshooting) )
  5. Select ALL INJECTORS STOP in the PGM-FI INSPECTION menu with the HDS
  6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  7. Remove the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  8. Remove the six spark plugs
  9. Attach the compression gauge to a spark plug hole
  10. Step on the accelerator pedal to open the throttle fully, then crank the engine with the starter motor, and measure the compression
  11. Measure the compression on the remaining cylinders
  12. If the compression is not within specifications, check the following items, then remeasure the compression Incorrect valve clearance Confirmation of cam timing Damaged or worn cam lobes Damaged or worn valves and seats Damaged cylinder head gaskets Damaged or worn piston rings Damaged or worn piston and cylinder bore
  13. Remove the compression gauge from the spark plug hole
  14. Install the six spark plugs
  15. Install the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  16. Select PCM reset (see «ECM/PCM RESET»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__ecmpcm-reset) ) in the PGM-FI INSPECTION menu to cancel ALL INJECTORS STOP with the HDS

VTEC Rocker Arm Test

Special Tools Required

  1. VTEC air stop tool B 07AAJ-R70A200
  2. VTEC air adapter 070AJ-001A101
  3. Air pressure regulator 07AAJ-PNAA101
  4. VTEC air stop tool A07AAJ-R70A100

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  1. Remove the six spark plugs
  2. Remove the cylinder head covers (see «TIMING BELT DRIVE PULLEY REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  3. Rotate the crankshaft pulley clockwise, and visually check all the intake primary rocker arms (A) and the intake secondary rocker arms (B) moves independently If the intake primary rocker arm and the intake secondary rocker arm move together, remove the intake primary rocker arm and the intake secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest If the intake primary rocker arm and the intake secondary rocker arm move independently, go to step 5
  4. Rotate the crankshaft pulley clockwise, and visually check all the exhaust primary rocker arms (A) and the exhaust secondary rocker arms (B) move independently If the exhaust primary rocker arm and the exhaust primary rocker arm move together, remove the exhaust primary rocker arm and the exhaust secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly If any exhaust rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest If the exhaust primary rocker arm and the exhaust secondary rocker arm move independently, go to step 5
  5. Check that the air pressure on the shop air compressor gauge indicates over 981 kPa (10 0 kgf/cm 2 , 142 psi)
  6. Inspect the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__valve-clearance-adjustment) )
  7. Remove the sealing bolts, then install the VTEC air stop tool B (A) and the VTEC air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown FRONT
  8. Remove the sealing bolts, then install the VTEC air stop tool A (A) and the VTEC air adapter (B) to the inspection hole, then connect the air pressure regulator (C) as shown REAR
  9. Loosen the valve on the regulator, and apply the specified air pressure
  10. With the specified air pressure applied, rotate the crankshaft pulley clockwise, and visually check all the intake primary rocker arms (A) and the intake secondary rocker arms (B) move together If the intake primary rocker arm and the intake secondary rocker arm move independently, remove the intake primary rocker arm and the intake secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest If the intake primary rocker arm and the intake secondary rocker arm move together, go to step 11
  11. With the specified air pressure applied, rotate the crankshaft pulley clockwise, and visually check all the exhaust primary rocker arms (A) and the exhaust secondary rocker arms (B) move together If the exhaust primary rocker arm and the exhaust secondary rocker arm move independently, remove the exhaust primary rocker arm and the exhaust secondary rocker arm as an assembly, and check that the pistons in the rocker arms move smoothly If any exhaust rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest If the exhaust primary rocker arm and the exhaust secondary rocker arm move together, go to step 12
  12. Remove the air pressure regulator, the VTEC air adapter, the VTEC air stop tool A, and the VTEC air stop tool B
  13. Tighten the sealing bolts to 22 N m (2 2 kgf m, 16 lbf ft)
  14. Install the cylinder head covers (see «CYLINDER HEAD COVER INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  15. Install the six spark plugs

Valve Clearance Adjustment

Note. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC), and monitor the engine coolant temperature (ECT) sensor 1 Adjust the valve clearance only when the ECT sensor 1 temperature is less than 100°F (38°C)

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Scheme 191: Valve Clearance Adjustment
Scheme 191: Valve Clearance Adjustment

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  1. Remove the cylinder head covers (see «TIMING BELT DRIVE PULLEY REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. Set the No 1 piston at top dead center (TDC) Align the pointer (A) on the front upper cover with the No 1 piston TDC mark (B) on the front camshaft pulley
  3. Select the correct feeler gauge for the valve clearance you are going to check Valve Clearance Intake 0.20-0.24 mm (0.008-0.009 in) Exhaust 0.28-0.32 mm (0.011-0.013 in) REAR FRONT
  4. Insert the feeler gauge (A) between the adjusting screw and the end of the valve stem on the No 1 cylinder, and slide it back and forth, you should feel a slight amount of drag INTAKE EXHAUST
  5. If you feel too much or too little drag, loosen the locknut, and turn the adjusting screw until the drag on the feeler gauge is correct INTAKE EXHAUST
  6. While holding the adjusting screw with the screw driver, tighten the locknut, then recheck the clearance Repeat the adjustment, if necessary
  7. Rotate the crankshaft clockwise Align the pointer (A) on the front upper cover with the No 4 piston TDC mark (B) on the front camshaft pulley
  8. Check and, if necessary, adjust the valve clearance on the No 4 cylinder
  9. Rotate the crankshaft clockwise Align the pointer (A) on the front upper cover with the No 2 piston TDC mark (B) on the front camshaft pulley
  10. Check and, if necessary, adjust the valve clearance on the No 2 cylinder
  11. Rotate the crankshaft clockwise Align the pointer (A) on the front upper cover with the No 5 piston TDC mark (B) on the front camshaft pulley
  12. Check and, if necessary, adjust the valve clearance on the No 5 cylinder
  13. Rotate the crankshaft clockwise Align the pointer (A) on the front upper cover with the No 3 piston TDC mark (B) on the front camshaft pulley
  14. Check and, if necessary, adjust the valve clearance on the No 3 cylinder
  15. Rotate the crankshaft clockwise Align the pointer (A) on the front upper cover with the No 6 piston TDC mark (B) on the front camshaft pulley
  16. Check and, if necessary, adjust the valve clearance on the No 6 cylinder
  17. Install the cylinder head covers (see «CYLINDER HEAD COVER INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )

Crankshaft Pulley Removal and Installation

Special Tools Required

  1. Handle, 6-25-660L 07JAB-001020B
  2. Holder attachment, 50 mm, offset 07MAB-PY3010A
  3. Socket, 19 mm 07JAA-001020A, or equivalent

Scheme 203

Scheme 203: Removal
Scheme 203: Removal
  1. Raise the vehicle on the lift
  2. Remove the right front wheel
  3. Remove the splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) )
  4. Remove the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system__drive-belt-replacement) )
  5. Hold the pulley with the holder handle (A) and the holder attachment (B)
  6. Remove the bolt with a heavy duty 19 mm socket (C) and a breaker bar, then remove the crankshaft pulley

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Scheme 204: Installation
Scheme 204: Installation

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  1. Remove any oil and clean the pulleys (A), the crankshaft (B), the bolt (C), and the washer (D) Lubricate with new engine oil as shown
  2. Install the crankshaft pulley, and tighten the bolt Do not use an impact wrench Hold the pulley with the holder handle (A) and the holder attachment (B) Tighten the bolt to 64 N m (6 5 kgf m, 47 lbf ft) with a torque wrench and a 19 mm socket (C) Mark the bolt head (D) and the crankshaft pulley (E) as shown, then tighten the bolt an additional 60° (The mark on the bolt head lines up with the mark on the crankshaft pulley)
  3. Install the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system__drive-belt-replacement) )
  4. Install the splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) )
  5. Install the right front wheel

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Scheme 206: Timing Belt Inspection
Scheme 206: Timing Belt Inspection

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  1. Remove the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system__drive-belt-replacement) )
  2. Remove the front upper cover
  3. Inspect the timing belt for cracks and oil or coolant contamination Replace the belt if it is cracked, or contaminated with oil or coolant Wipe off any oil or solvent that gets on the belt pulleys NOTE: If there is any leakage, repair them before replacing the timing belt

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Scheme 208: Timing Belt Removal
Scheme 208: Timing Belt Removal

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  1. Remove the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  2. Turn the crankshaft so its white mark (A) lines up with the pointer (B) NOTE: The other pointer (C) is not used
  3. Check that the No 1 piston top dead center (TDC) mark (A) on the front camshaft pulley and the pointer (B) on the front upper cover are aligned NOTE: If the marks are not aligned, rotate the crankshaft 360 degrees, and recheck the camshaft pulley mark
  4. Raise the vehicle on the lift, then remove the right front wheel
  5. Remove the splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) )
  6. Remove the drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system) )
  7. Support the engine with a jack and a wood block under the oil pan
  8. Remove the ground cable (A), then remove the upper half of the side engine mount bracket (B)
  9. Remove the crankshaft pulley (see «CRANKSHAFT PULLEY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__crankshaft-pulley-removal-and-installation) )
  10. Remove the front upper cover (A) and the rear upper cover (B)
  11. Remove the lower cover
  12. Remove one of the battery clamp bolts from the battery tray, and grind the end of it as shown
  13. Thread the battery clamp bolt in as shown to hold the timing belt adjuster in its current position Tighten it by hand, do not use a wrench
  14. Remove the timing belt guide plate (A)
  15. Remove the lower half of the side engine mount bracket
  16. Remove the idler pulley bolt (A) and the idler pulley (B), then remove the timing belt Discard the idler pulley bolt

Timing Belt Installation

Note. The following procedure is for installing a used timing belt If you are installing a new belt, refer to the timing belt replacement procedure (see TIMING BELT REPLACEMENT )

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Scheme 218: Timing Belt Installation
Scheme 218: Timing Belt Installation

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  1. Clean the timing belt pulleys, the timing belt guide plate, and the upper and lower covers
  2. Set the timing belt drive pulley to top dead center (TDC) by aligning the TDC mark (A) on the tooth of the timing belt drive pulley with the pointer (B) on the oil pump
  3. Set the camshaft pulleys to TDC by aligning the TDC marks (A) on the camshaft pulleys with the pointers (B) on the back covers FRONT REAR
  4. Loosely install the idler pulley with a new idler pulley bolt so the pulley can move but does not come off
  5. If the auto-tensioner has extended and the timing belt cannot be installed, do the timing belt replacement procedure (see «TIMING BELT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-replacement) )
  6. Install the timing belt in a counterclockwise sequence starting with the drive pulley Take care not to damage the timing belt during installation Drive pulley (A) Idler pulley (B) Front camshaft pulley (C) Water pump pulley (D) Rear camshaft pulley (E) Adjusting pulley (F)
  7. Tighten the idler pulley bolt
  8. Remove the battery clamp bolt from the back cover
  9. Install the lower half of the side engine mount bracket
  10. Install the timing belt guide plate as shown
  11. Install the lower cover
  12. Install the front upper cover (A) and the rear upper cover(B)
  13. Install the crankshaft pulley (see «CRANKSHAFT PULLEY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__crankshaft-pulley-removal-and-installation) )
  14. Rotate the crankshaft pulley about six turns clockwise so the timing belt positions itself on the pulleys
  15. Turn the crankshaft pulley so its white mark (A) lines up with the pointer (B) NOTE: The other pointer (C) is not used
  16. Check the camshaft pulley marks NOTE: If the marks are not aligned, rotate the crankshaft 360 degrees, and recheck the camshaft pulley mark If the camshaft pulley marks are at TDC, go to step 17 If the camshaft pulley marks are not at TDC, remove the timing belt and repeat steps 2 through 16 FRONT REAR
  17. Install the upper half of the side engine mount bracket (A), then tighten the mounting bolts in the numbered sequence shown
  18. Install the ground cable (B)
  19. Install the drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system) )
  20. Install the splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) )
  21. Install the right front wheel
  22. Install the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  23. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )

Timing Belt Replacement

Note. The following procedure is for installing a new timing belt If you are installing a used belt, refer to the timing belt installation procedure (see TIMING BELT INSTALLATION )

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Scheme 232: Timing Belt Replacement
Scheme 232: Timing Belt Replacement

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  1. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. Clean the timing belt pulleys, the timing belt guide plate, and the upper and lower covers
  3. Set the timing belt drive pulley to top dead center (TDC) by aligning the TDC mark (A) on the tooth of the timing belt drive pulley with the pointer (B) on the oil pump
  4. Set the camshaft pulleys to TDC by aligning the TDC marks (A) on the camshaft pulleys with the pointers (B) on the back covers FRONT REAR
  5. Remove the battery clamp bolt from the back cover
  6. Remove the auto-tensioner
  7. Align the holes on the rod and the housing of the auto-tensioner
  8. Use a hydraulic press to slowly compress the auto-tensioner Insert a 2.0 mm (0.08 in) pin through the housing and the rod NOTE: The compression pressure should not exceed 9,800 N (1,000 kgf, 2,200 lbf)
  9. Install the auto-tensioner NOTE: Make sure the pin stays in place
  10. Thread the battery clamp bolt in as shown to hold the timing belt adjuster Tighten it by hand, do not use a wrench
  11. Loosely install the idler pulley with a new idler pulley bolt so the pulley can move but does not come off
  12. Install the timing belt in a counterclockwise sequence starting with the drive pulley
  13. Tighten the idler pulley bolt
  14. Remove the pin from the auto-tensioner
  15. Remove the battery clamp bolt from the back cover
  16. Install the lower half of the side engine mount bracket
  17. Install the timing belt guide plate as shown
  18. Install the lower cover
  19. Install the front upper cover (A) and the rear upper cover(B)
  20. Install the crankshaft pulley (see «CRANKSHAFT PULLEY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__crankshaft-pulley-removal-and-installation) )
  21. Rotate the crankshaft pulley about six turns clockwise so the timing belt positions itself on the pulleys
  22. Turn the crankshaft pulley so its white mark (A) lines up with the pointer (B) NOTE: The other pointer (C) is not used
  23. Check the camshaft pulley marks NOTE: If the marks are not aligned, rotate the crankshaft 360 degrees, and recheck the camshaft pulley mark If the camshaft pulley marks are at TDC, go to step 24 If the camshaft pulley marks are not at TDC, remove the timing belt and repeat steps 3 through 23 FRONT REAR
  24. Install the upper half of the side engine mount bracket (A), then tighten the mounting bolts in the numbered sequence shown
  25. Install the ground cable (B)
  26. Install the drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system) )
  27. Install the splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) )
  28. install the right front wheel
  29. Install the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  30. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )

Scheme 250

Scheme 250: Timing Belt Adjuster Replacement
Scheme 250: Timing Belt Adjuster Replacement
  1. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. Remove the battery clamp bolt from the back cover
  3. Remove the auto-tensioner (see step 6 on «TIMING BELT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-replacement) )
  4. Remove the bolt (A), then remove the timing belt adjuster (B) and the collar (C)
  5. Install the timing belt adjuster in the reverse order of removal
  6. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-installation) )

Scheme 251

Scheme 251: Timing Belt Drive Pulley Replacement
Scheme 251: Timing Belt Drive Pulley Replacement
  1. Remove the liming belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. Remove the liming belt stopper (A), then remove the timing belt drive pulley (B) and the key (C)
  3. Inspect the timing belt drive pulley and the key for damage If it is cracked or damaged, replace the timing belt drive pulley
  4. Install the new timing belt drive pulley and the key, then install the timing belt stopper
  5. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-installation) )
  6. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )

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Scheme 252: Front
Scheme 252: Front

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  1. Remove the intake manifold (see «REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  2. Remove the three ignition coils from the front cylinder head (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  3. Disconnect the exhaust recirculation (EGR) valve connector (A) and remove the harness holder mounting bolt (B) and the harness clamp (C)
  4. Remove the harness holder (D) from the bracket
  5. Remove the front cylinder head cover

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Scheme 254: Rear
Scheme 254: Rear

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  1. Remove the strut brace (see «FRAME BRACE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/frames-subframes-crossmembers/#frame) )
  2. Remove the intake manifold (see «REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  3. Remove the three ignition coils from the rear cylinder head (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  4. Remove the harness holder mounting bolts (A) and the engine ground cable (B)
  5. Disconnect the three injector connectors (C) and the two harness clamps (D)
  6. Remove the harness clamp (E) and disconnect the breather hose (F)
  7. Remove the harness (G) from the upper cover
  8. Remove the engine hanger bracket (H)
  9. Remove the harness holder mounting bolts (A) and disconnect the knock sensor connector (B) and the camshaft position (CMP) sensor connector (C)
  10. Remove the rear cylinder head cover

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Scheme 257: Front
Scheme 257: Front

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  1. Check the spark plug seals for damage If any seal is damaged, replace it
  2. Thoroughly clean the head cover gasket and the groove
  3. Install the head cover gasket (A) in the groove of the cylinder head cover (B) Make sure the head cover gasket is seated securely
  4. Remove all of the old liquid gasket from the rocker shaft holder and the cylinder head
  5. Clean the head cover contacting surfaces with a shop towel
  6. Apply liquid gasket, P/N 08717-0004, 08718-0003, or 08718-0009, evenly to the rocker shaft holder mating areas (A) Install the component within 5 minutes of applying the liquid gasket NOTE: If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply the new liquid gasket
  7. Set the spark plug seals (A) on the spark plug tubes, and install the front cylinder head cover (B) NOTE: Wait at least 30 minutes before filling the engine with oil Do not run the engine for at least 3 hours after installing the cylinder head cover
  8. Inspect the spark plug seals for damage
  9. Inspect the cover washers (C) Replace any washer that is damaged or deteriorated
  10. Tighten the bolts in three steps In the final step tighten all bolts, in sequence, 12 N m (1 2 kgf m, 8 7 lbf ft)
  11. Install the harness holder (A) to the bracket
  12. Connect the exhaust gas recirculation (EGR) valve connector (B) and install the harness holder mounting bolt (C) and the harness clamp (D)
  13. Install the three ignition coils to the front cylinder head (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  14. Install the intake manifold (see «INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )

Scheme 262

Scheme 262: Rear
Scheme 262: Rear

Scheme 263

Scheme 263
Scheme 263

Scheme 264

Scheme 264
Scheme 264

Scheme 265

Scheme 265
Scheme 265

Scheme 266

Scheme 266
Scheme 266

Scheme 267

Scheme 267
Scheme 267
  1. Check the spark plug seals for damage If any seal is damaged, replace it
  2. Thoroughly clean the head cover gasket and the groove
  3. Install the head cover gasket (A) in the groove of the cylinder head cover (B) Make sure the head cover gasket is seated securely
  4. Remove all of the old liquid gasket from the rocker shaft holder and the cylinder head
  5. Clean the head cover contacting surfaces with a shop towel
  6. Apply liquid gasket, P/N 08717-0004, 08718-0003, or 08718-0009, evenly to the rocker shaft holder mating areas (A) Install the component within 5 minutes of applying the liquid gasket NOTE: If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply the new liquid gasket
  7. Set the spark plug seals (A) on the spark plug tubes, and install the rear cylinder head cover (B) NOTE: Wait at least 30 minutes before filling the engine with oil Do not run the engine for at least 3 hours after installing the cylinder head cover
  8. Inspect the spark plug seals for damage
  9. Inspect the cover washers (C) Replace any washer that is damaged or deteriorated
  10. Tighten the bolts in three steps In the final step tighten all bolts, in sequence, 12 N m (1 2 kgf m,8 7 lbf ft)
  11. Connect the knock sensor connector (A) and the camshaft position (CMP) sensor connector (B) and install the harness holder mounting bolts (C)
  12. Install the engine hanger bracket (A)
  13. Install the harness (B) to the upper cover
  14. Connect the breather hose (C) and install the harness clamp (D)
  15. Reconnect the three injector connectors (E) and the two harness clamps (F)
  16. Install the harness holder mounting bolts (G) and engine ground cable (H)
  17. Install the three ignition coils to the rear cylinder head (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  18. Install the intake manifold (see «INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  19. Install the strut brace (see «FRAME BRACE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/frames-subframes-crossmembers/#frame) )

Cylinder Head Removal

Note. Use fender covers to avoid damaging painted surfaces To avoid damaging the wiring and terminals, unplug the wiring connectors carefully while holding the connector portion Connect the Honda Diagnostic System (HDS) to the data link connector (DLC), and monitor the engine coolant temperature (ECT) sensor 1 To avoid damaging the cylinder head, wait until the ECT sensor 1 temperature drops below 100°F (38°C) before loosening the cylinder head bolts Mark all wiring and hoses to avoid misconnection Also, be sure that they do not contact any other wiring or hoses, or interfere with any other parts

Scheme 268

Scheme 268: Cylinder Head Removal
Scheme 268: Cylinder Head Removal

Scheme 269

Scheme 269
Scheme 269

Scheme 270

Scheme 270
Scheme 270

Scheme 271

Scheme 271
Scheme 271

Scheme 272

Scheme 272
Scheme 272

Scheme 273

Scheme 273
Scheme 273

Scheme 274

Scheme 274
Scheme 274
  1. Remove the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  2. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/tl/iv-2008-2011/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) )
  3. Do the battery terminal disconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
  4. Drain the engine coolant (see «COOLANT CHECK»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  5. Remove the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system) )
  6. Remove the intake manifold (see «REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  7. Remove the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  8. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  9. Disconnect the following engine wire harness connectors and wire harness clamps from the cylinder head Six injector connectors Knock sensor connector Engine coolant temperature (ECT) sensor 1 connector Engine mount control solenoid valve connector Camshaft position (CMP) sensor connector Rocker arm oil control solenoid connector Rocker arm oil pressure switch connector Two air fuel ratio (A/F) sensor connectors Two secondary heated oxygen sensor (secondary HO2S) connectors
  10. Remove the front warm up three way catalytic converter (front WU-TWC) (see «WARM UP TWC REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ) and the rear warm up three way catalytic converter (rear WU-TWC) (see «REAR (BANK 1)»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#catalytic-converter-system) )
  11. Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see «FUEL LINE/QUICK-CONNECT FITTING REMOVAL»(/acura/tl/iv-2008-2011/remont/fuel-system/#fuel-supply-system) )
  12. Remove the connector bracket from the front cylinder head
  13. Remove the engine mount control solenoid valve bracket from the rear cylinder head
  14. Remove the evaporative emission (EVAP) canister joint with the bracket (see step 9 under Rear Camshaft Replacement)
  15. Remove the injector bases (see «INJECTOR BASE REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  16. Remove the water passage (see «WATER PASSAGE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  17. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) ).
  18. Remove the camshaft pulleys (A) and the back covers (B) FRONT REAR
  19. Remove the cylinder head covers (see «TIMING BELT DRIVE PULLEY REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  20. Remove the cylinder head bolts To prevent warpage, loosen the bolts in sequence 1/3 turn at a time, repeat the sequence until all bolts are loosened FRONT REAR
  21. Remove the cylinder heads

Scheme 275

Scheme 275: Front
Scheme 275: Front

Scheme 276

Scheme 276
Scheme 276

Scheme 277

Scheme 277
Scheme 277
  1. Remove the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  2. Do the battery removal procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
  3. Dram the engine coolant (see «COOLANT CHECK»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  4. Disconnect the radiator hoses
  5. Remove the exhaust gas recirculation (EGR) valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#egr-system) )
  6. Remove the EGR valve stud bolts (A)
  7. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  8. Remove the front rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__rocker-arm-assembly-removal) )
  9. Remove the front camshaft pulley
  10. Remove the thrust cover (A), then remove the front camshaft (B)
  11. Install the front camshaft in the reverse order of removal Always use a new O-ring (C) Apply new engine oil to the journals and the cam lobes
  12. Apply new engine oil to the threads of the camshaft pulley mounting bolt, then install the front camshaft pulley (see step 14 on «REAR»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  13. Install the front rocker arm assembly, then tighten the mounting bolts (see step 12 on «FRONT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  14. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-installation) )
  15. Adjust the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__valve-clearance-adjustment) )
  16. Install the EGR valve stud bolts, then install the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#egr-system) )
  17. Connect the radiator hoses
  18. Do the battery installation procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
  19. Fill the radiator with engine coolant, and bleed the air from the cooling system with the heater valve open (see step 9 on «COOLANT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  20. Install the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  21. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )

Scheme 278

Scheme 278: Rear
Scheme 278: Rear

Scheme 279

Scheme 279
Scheme 279

Scheme 280

Scheme 280
Scheme 280
  1. Remove the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  2. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/tl/iv-2008-2011/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) )
  3. Do the battery removal procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
  4. Dram the engine coolant (see «COOLANT CHECK»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  5. Remove the under-hood fuse/relay box from the bracket
  6. Remove the air cleaner assembly (see «THROTTLE BODY CLEANING»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#intake-air-system__throttle-body-cleaning) )
  7. Remove the quick-connect fitting cover, then disconnect the fuel feed hose (see step 11 on «CYLINDER HEAD REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__cylinder-head-removal) )
  8. Disconnect the heater hoses
  9. Disconnect the evaporative emission (EVAP) canister hose (A), then remove the EVAP canister joint(B) Nut Specification: 6 x 1.0 mm, 12 N.m (1.2 kgf.m, 8.7 lbf.ft)
  10. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  11. Remove the rear rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__rocker-arm-assembly-removal) )
  12. Remove the rear camshaft pulley
  13. Remove the thrust cover (A), then remove the rear camshaft (B)
  14. Install the rear camshaft in the reverse order of removal Always use a new O-ring (C) Apply new engine oil to the journals and cam lobes
  15. Apply new engine oil to the threads of the camshaft pulley mounting bolt, then install the rear camshaft pulley (see step 14 on «CYLINDER HEAD INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  16. Install the rear rocker arm assembly, then tighten the mounting bolts (see step 12 on «REAR»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  17. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-installation) )
  18. Adjust the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__valve-clearance-adjustment) )
  19. Install the EVAP canister joint, then connect the EVAP canister hose
  20. Connect the heater hoses
  21. Connect the fuel feed hose, then install the quick-connect fitting cover (see step 20 on «CYLINDER HEAD INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  22. Install the air cleaner assembly (see «THROTTLE BODY CLEANING»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#intake-air-system__throttle-body-cleaning) )
  23. Install the under-hood fuse/relay box to the bracket
  24. Do the battery installation procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
  25. Inspect for fuel leaks Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode (do not operate the starter) so the fuel pump runs for about 2 seconds and pressurizes the fuel line Repeat this operation three times, then check for fuel leakage at any point in the fuel line
  26. Fill the radiator with engine coolant, and bleed the air from the cooling system with the heater valve open (see step 9 on «COOLANT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  27. Install the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )
  28. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )

Scheme 281

Scheme 281: Cylinder Head Inspection for Warpage
Scheme 281: Cylinder Head Inspection for Warpage
  1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__cylinder-head-removal) )
  2. Inspect the camshaft (see «CAMSHAFT INSPECTION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  3. Check the cylinder head for warpage Measure along the edges, and three ways across the center If warpage is less than 0.05 mm (0.002 in), cylinder head resurfacing is not required If warpage is between 0.05 mm (0.002 in) and 0.2 mm (0.008 in), resurface the cylinder head Maximum resurface limit is 0.2 mm (0.008 in) based on a height of 121 mm (4.76 in) Cylinder Head Height Standard (New) 120.95-121.05 mm (4.762-4.766 in) Service Limit 120.8 mm (4.756 in.) PRECISION STRAIGHT EDGE

Rocker Arm Assembly Removal

Front

Scheme 282

Scheme 282: Rocker Arm Assembly Removal
Scheme 282: Rocker Arm Assembly Removal

Scheme 283

Scheme 283
Scheme 283

Scheme 284

Scheme 284
Scheme 284

Scheme 285

Scheme 285
Scheme 285
  1. Remove the cylinder head cover (see «TIMING BELT DRIVE PULLEY REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. Loosen the locknuts and the adjusting screws (A)
  3. Remove the rocker shaft bridge mounting bolts, the rocker shaft holder mounting bolts, and the rocker arm assembly Loosen the rocker shaft bridge mounting bolts and the rocker shaft holder mounting bolts in sequence two turns at a time, to prevent damaging the valves or the rocker arm assembly When removing the rocker arm assembly, do not remove the rocker shaft bridge mounting bolts and the rocker shaft holder mounting bolts The bolts will keep the rocker arms on the shafts
  4. Remove the cylinder head cover (see «TIMING BELT DRIVE PULLEY REPLACEMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  5. Loosen the locknuts and the adjusting screws (A)
  6. Remove the rocker shaft bridge mounting bolts, the rocker shaft holder mounting bolts, and the rocker arm assembly Loosen the rocker shaft bridge mounting bolts and the rocker shaft holder mounting bolts in sequence two turns at a time, to prevent damaging the valves or the rocker arm assembly When removing the rocker arm assembly, do not remove the rocker shaft bridge mounting bolts and the rocker shaft holder mounting bolts The bolts will keep the rocker arms on the shafts

Front

Note. Identify parts as they are removed so they can be reinstalled in their original locations Inspect the rocker shafts and the rocker arms (see ROCKER ARM AND SHAFT INSPECTION ) If reused, the rocker arms must be installed in their original locations When removing or installing the rocker arm assembly, do not remove the mounting bolts The bolts will keep the rocker arms, the rocker shaft bridge, and the rocker shaft holder on the shaft If the rocker shaft cannot be removed or installed by hand, remove or install the rocker shaft by heating the rocker shaft bridge Bundle the rocker arms with rubber bands to keep them together as a set, and remove the bands after the rocker arms have been installed Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to all contact points and bearing surfaces When replacing the rocker arm assembly, remove the fastening hardware from the new rocker arm assembly Never remove any of the circlips that retain the lost motion assemblies in the rocker shaft bridge The circlips are not available separately, and are factory installed in the rocker shaft bridge To remove the lost motion assemblies, first remove the rocker shafts and the rocker arms

Scheme 286

Scheme 286: Front
Scheme 286: Front

Rear

Note. Identify parts as they are removed so they can be reinstalled in their original locations Inspect the rocker shafts and the rocker arms (see ROCKER ARM AND SHAFT INSPECTION ) If reused, the rocker arms must be installed in their original locations When removing or installing the rocker arm assembly, do not remove the mounting bolts The bolts will keep the rocker arms, the rocker shaft bridge, and the rocker shaft holder on the shaft If the rocker shaft cannot be removed or installed by hand, remove or install the rocker shaft by heating the rocker shaft bridge Bundle the rocker arms with rubber bands to keep them together as a set, and remove the bands after the rocker arms have been installed Prior to reassembling, clean all the parts insolvent, dry them, and apply new engine oil to all contact points and bearing surfaces When replacing the rocker arm assembly, remove the fastening hardware from the new rocker arm assembly Never remove any o1 the circlips that retain the lost motion assemblies in the rocker shaft bridge The circlips are not available separately, and are factory installed in the rocker shaft bridge To remove the lost motion assemblies, first remove the rocker shafts and the rocker arms

Scheme 287

Scheme 287: Rear
Scheme 287: Rear

Scheme 288

Scheme 288: Rocker Arm and Shaft Inspection
Scheme 288: Rocker Arm and Shaft Inspection

Scheme 289

Scheme 289
Scheme 289

Scheme 290

Scheme 290
Scheme 290

Scheme 291

Scheme 291
Scheme 291

Scheme 292

Scheme 292
Scheme 292
  1. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__rocker-arm-assembly-removal) )
  2. Disassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  3. Measure the diameter of the shaft at the first rocker location
  4. Zero the gauge (A) to the shaft diameter
  5. Measure the inside diameter of the rocker arm, and check it for an out-of-round condition Intake Rocker Arm-to-Shaft Clearance Standard (New) 0.015-0.046 mm (0.0006-0.0018 in) Service Limit 0.046 mm (0.0018 in) Exhaust Rocker Arm-to-Shaft Clearance Standard (New) 0.015-0.046 mm (0.0006-0.0018 in) Service Limit 0.046 mm (0.0018 in)
  6. Repeat for all rockers and both shafts If the clearance is over the limit, replace the rocker shaft and all over-tolerance rocker arms If any VTEC rocker arm needs replacement, replace all rocker arms in that set (primary and secondary)
  7. Inspect the rocker arm piston (A) Slide them into the rocker arms If 1 hey do not move smoothly, replace the rocker arm set NOTE: Apply new engine oil to the rocker arm piston when reassembling When removing 1 he rocker arm piston from the intake secondary (B), and or the exhaust primary rocker arm (C), carefully apply air pressure to the oil passage of the rocker arm INTAKE EXHAUST
  8. Reassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  9. Install the rocket arm assembly (see «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )

Scheme 293

Scheme 293: Camshaft Inspection
Scheme 293: Camshaft Inspection

Scheme 294

Scheme 294
Scheme 294

Scheme 295

Scheme 295
Scheme 295

Scheme 296

Scheme 296
Scheme 296

Scheme 297

Scheme 297
Scheme 297

Scheme 298

Scheme 298
Scheme 298

Scheme 299

Scheme 299
Scheme 299

Scheme 300

Scheme 300
Scheme 300

Scheme 301

Scheme 301
Scheme 301

Scheme 302

Scheme 302
Scheme 302
  1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__cylinder-head-removal) )
  2. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__rocker-arm-assembly-removal) )
  3. Disassemble the rocker arm assembly (see «Rocker Arm and Shaft Disassembly/Reassembly»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  4. Front: Put the rocker shafts bridge and the rocker shaft holder on the front cylinder head, then tighten the bolts to the specified torque Specified Torque 8x1 25 mm 22 N m (2 2 kgf m, 16 lbf ft)
  5. Rear: Put the rocker shaft bridge and the rocker shaft holder on the rear cylinder head, then tighten the bolts to the specified torque Specified Torque 8x 1 25 mm 22 N m (2 2 kgf m, 16 lbf ft)
  6. Seat the camshaft by pushing it toward the rear of the cylinder head
  7. Zero the dial indicator against the end of the camshaft Push the camshaft back and forth and read the end play If the end play is beyond the service limit, replace the thrust cover and recheck If it is still beyond the service limit, replace the camshaft Camshaft End Play Standard (New) 0.05-0.20 mm (0.002-0.008 in) Service Limit 0.20 mm (0.008 in)
  8. Remove the camshaft thrust cover (A), then pull out the camshaft (B)
  9. Wipe the camshaft clean, then inspect the lift ramps Replace the camshaft if any lobes are pitted, scored, or excessively worn
  10. Measure the diameter of each camshaft journal
  11. Zero the gauge to the journal diameter
  12. Clean the camshaft bearing surfaces in the cylinder head Measure the inside diameter of each camshaft bearing surface, and check for an out-of-round condition If the camshaft-to-holder clearance is within limits, go to step 13 If the camshaft-to-holder clearance is beyond the service limit and the camshaft has been replaced, replace the cylinder head If the camshaft-to-holder clearance is beyond the service limit and the camshaft has not been replaced, go to step 12 Camshaft-to-Holder Oil Clearance Standard (New): 0.050-0.089 mm (0.0020-0.0035 in) Service Limit 0.15 mm (0.0060 in)
  13. Check total runout with the camshaft supported on V-blocks If the total runout of the camshaft is within the service limit, replace the cylinder head If the total runout is beyond the service limit, replace the camshaft and recheck the oil clearance If the oil clearance is still out of tolerance, replace the cylinder head Camshaft Total Runout Standard (New). 0.03 mm (0.0012 in) max Service Limit 0.04 mm (0.002 in)
  14. Measure the cam lobe height Cam Lobe Height Standard (New)- CAM LOBE HEIGHT MEASUREMENT CHART INTAKE EXHAUST PRI 34 299 mm (1 3504 in) 36 734 mm (1 4462 in) SEC 35 932 mm (1 4146 in) 37 370 mm (1 4713 m) FRONT REAR

Valve, Spring, and Valve Seal Removal

Special Tools Required

Valve spring compressor attachment

07757-PJ1010A

Identify the valves and the valve springs as they are removed so that each item can be reinstalled in its original position

Scheme 303

Scheme 303: Valve, Spring, and Valve Seal Removal
Scheme 303: Valve, Spring, and Valve Seal Removal

Scheme 304

Scheme 304
Scheme 304

Scheme 305

Scheme 305
Scheme 305

Scheme 306

Scheme 306
Scheme 306
  1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__cylinder-head-removal) )
  2. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__rocker-arm-assembly-removal) )
  3. Using an appropriate-sized socket (A) and a plastic mallet (B), lightly tap the spring retainer to loosen the valve cotters
  4. Install the valve spring compressor attachment and the valve spring compressor Compress the spring and remove the valve cotters
  5. Remove the valve spring compressor and the valve spring compressor attachment, then remove the spring retainer, the valve spring, and the valve
  6. Install the valve guide seal remover (A)
  7. Remove the valve seal
  8. Remove the valve spring seat

Scheme 307

Scheme 307: Valve Inspection
Scheme 307: Valve Inspection
  1. Remove the valves (see «VALVE, SPRING, AND VALVE SEAL REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__valve-spring-and-valve-seal-removal) )
  2. Measure the valve in these areas Intake Valve Dimensions A Standard (New) 35.90-36.01 mm (1.413-1.421 in) B Standard (New) 116.55-117.15 mm (4.589-4.612 in) C Standard (New) 5.485-5.495 mm (0.2159-0.2163 in) C Service Limit 5.455 mm (0.2148 in) Exhaust Valve Dimensions A Standard (New) 29.90-30.10 mm (1.177-1.185 in) B Standard (New) 113.90-114.50 mm (4.484-4.508 in) C Standard (New) 5.450-5.460 mm (0.2146-0.2150 in) C Service Limit 5.420 mm (0.2134 in)

Scheme 308

Scheme 308: Valve Stem-to-Guide Clearance Inspection
Scheme 308: Valve Stem-to-Guide Clearance Inspection
  1. Remove the valves (see «VALVE, SPRING, AND VALVE SEAL REMOVAL»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__valve-spring-and-valve-seal-removal) )
  2. Subtract the OD of the valve stem, measured with a micrometer, from the ID of the valve guide, measured with an inside micrometer or a ball gauge Take the measurements in three places along the valve stem and three places inside the valve guide The difference between the largest guide measurement and the smallest stem measurement should not exceed the service limit Intake Valve Stem-to-Guide Clearance Standard (New) 0.020-0.045 mm (0.0008-0.0018 in) Service Limit 0.08 mm (0.003 in) Exhaust Valve Stem-to-Guide Clearance Standard (New) 0.055-0.080 mm (0.0022-0.0031 in) Service Limit 011 mm (0.004 in)

Valve Guide Replacement

Special Tools Required

  1. Valve guide driver, 5 35 mm 07742-0010100
  2. Valve guide reamer, 5 5 mm 07HAH-PJ7A100

Scheme 309

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Scheme 309

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Scheme 313

Scheme 313
Scheme 313
  1. Inspect the valve stem-to-guide clearance (see «VALVE STEM-TO-GUIDE CLEARANCE INSPECTION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. As illustrated, use a commercially available air-impact valve guide driver (A) modified to fit the diameter of the valve guides In most cases, the same procedure can be done using the valve guide driver and a conventional hammer
  3. Select the proper replacement guides, and chill them in the freezer section of a refrigerator for at least an hour
  4. Use a hot plate or oven to evenly heat the cylinder head to 300°F (150°C) Monitor the temperature with a cooking thermometer Do not get the head hotter than 300°F (150°C), excessive heat may loosen the valve seats
  5. Working from the camshaft side, use the driver and an air hammer to drive the guide about 2 mm (0.1 in) towards the combustion chamber This will knock off some of the carbon and make removal easier Hold the air hammer directly in line with the valve guide to prevent damaging the driver Wear safety goggles or a face shield
  6. Turn the head over, and drive the guide out toward the camshaft side of the head
  7. If a valve guide still will not move, drill it out with a 8 mm (5/16 in) bit, then try again NOTE: Drill guides only in extreme cases, you could damage the cylinder head if the guide breaks
  8. Remove the new guide(s) from the freezer, one at a time, as you need them
  9. Apply a thin coat of new engine oil to the outside of the new valve guide Install the guide from the camshaft side of the head, use the valve guide driver to drive the guide to the specified installed height (A) of the guide (B) If you have all 12 guides to do, you may have to reheat the head Valve Guide Installed Height Intake- 21.20-22.20 mm (0.835-0.874 in) Exhaust. 20.60-21.60 mm (0.811-0.850 in)
  10. Coat both the reamer and the valve guide with cutting oil
  11. Rotate the reamer clockwise the full length of the valve guide bore
  12. Continue to rotate the reamer clockwise while removing it from the bore
  13. Thoroughly wash the guide in detergent and water to remove any cutting residue
  14. Check the clearance with a valve (see «VALVE STEM-TO-GUIDE CLEARANCE INSPECTION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) ) Verify that a valve slides in the intake and exhaust valve guides without sticking
  15. Inspect the valve seating If necessary renew the valve seat using a valve seat cutter (see «VALVE SEAT RECONDITIONING»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )

Scheme 314

Scheme 314: Valve Seat Reconditioning
Scheme 314: Valve Seat Reconditioning

Scheme 315

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Scheme 315

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Scheme 316
Scheme 316

Scheme 317

Scheme 317
Scheme 317
  1. Inspect valve stem-to-guide clearance (see «VALVE STEM-TO-GUIDE CLEARANCE INSPECTION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) ) If the valve guides are worn, replace them (see «VALVE STEM-TO-GUIDE CLEARANCE INSPECTION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) ) before cutting the valve seats
  2. Renew the valve seats in the cylinder head using a valve seat cutter
  3. Carefully cut a 45° seat, removing only enough material to ensure a smooth and concentric seat
  4. Bevel the upper and lower edges at the angles shown in the illustration Check the width of the seat and adjust accordingly
  5. Make one more very light pass with the 45° cutter to remove any possible burrs caused by the other cutters
  6. After resurfacing the seat, inspect it for even valve seating Apply Prussian Blue compound (A) to the valve face Insert the valve in its original location in the head, then lift it and snap it closed against the seat several times
  7. The actual valve seating surface (B), as shown by the blue compound, should be centered on the seat If it is too high (closer to the valve stem), you must make a second cut with the 67 5 ° cutter (intake seat) or the 60° cutter (exhaust seat) to move it down, then one more cut with the 45 ° cutter to restore seat width If it is too low (closer to the valve edge), you must make a second cut with the 30° cutter to move it up, then one more cut with the 45° cutter to restore seat width NOTE: The final cut should always be made with the 45° cutter
  8. Insert the intake and exhaust valves in the head, and measure the valve stem installed height (A) Intake Valve Stem Installed Height Standard (New) 46.75-47.55 mm (1.841-1.872 in) Service Limit 47.80 mm (1.882 in) Exhaust Valve Stem Installed Height Standard (New) 46.68-47.48 mm (1.838-1.869 in) Service Limit 47.73 mm (1.879 in)
  9. If the valve stem installed height is over the service limit, replace the valve and recheck If it is still over the service limit, replace the cylinder head, the valve seat in the head is too deep

Valve, Spring, and Valve Seal Installation

Special Tools Required

  1. Stem seal driver, 30 mm 07PAD-0010000
  2. Valve spring compressor attachment 07757-PJ1010A

Scheme 318

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Scheme 318

Scheme 319

Scheme 319
Scheme 319

Scheme 320

Scheme 320
Scheme 320
  1. Coat the valve stems with new engine oil Install the valves in the valve guides
  2. Check that the valves move up and down smoothly
  3. Install the spring seats on the cylinder head
  4. Install the new valve seals (A) using the 5.5 mm side of the stem seal driver (B) NOTE: Exhaust valve seals (C) have a black spring (D) and intake valve seals (E) have a white or silver spring (F) They are not interchangeable
  5. Install the valve spring and the spring retainer Place the end of the valve spring with the closely wound coils toward the cylinder head
  6. Install the valve spring compressor attachment and the valve spring compressor Compress the spring and install the valve cotters
  7. Remove the valve spring compressor and the valve spring compressor attachment
  8. Lightly tap the end of each valve stem two or three times with a plastic mallet (A) to ensure proper seating of the valve and valve cotters Tap the valve stem only along its axis so you do not bend the stem

Scheme 321

Scheme 321: Front
Scheme 321: Front

Scheme 322

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Scheme 322

Scheme 323

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Scheme 324
Scheme 324

Scheme 325

Scheme 325
Scheme 325
  1. Loosen the locknuts and the adjusting screws
  2. Dry the camshaft oil seal housing
  3. Apply a light coat of new engine oil to the lip of the camshaft oil seal
  4. Gently tap the new camshaft oil seal (A) into the cylinder head Tap the camshaft oil seal in squarely Install the oil seal about 0.5-15 mm (0.02-0.06 in) below the surface of the cylinder head
  5. Insert the camshaft (B) into the cylinder head, then install the camshaft thrust cover (C) Always use a new O-ring (D) Apply new engine oil to the journals and the cam lobes
  6. Check that the oil seal lips are not distorted
  7. Install the solid dowel pin (E)
  8. If the rocker arm assembly is disassembled, reassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  9. Remove all of the old liquid gasket from the rocker shaft holder and the cylinder head
  10. Apply liquid gasket, P/N 08717-0004, 08718-0003, or 08718-0009, evenly to the rocker shaft holder mating surface of the cylinder head Install the component within 5 minutes of applying the liquid gasket NOTE: Apply a 2.5 mm (0.98 in) diameter bead of liquid gasket along the broken line If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply the new liquid gasket
  11. Set the rocker arm assembly in place, and loosely install the bolts Make sure that the rocker arms are properly positioned on the valve stems NOTE: Wait at least 30 minutes before filling the engine with oil Do not run the engine for at least 3 hours after installing the rocker arm assembly
  12. Tighten each bolt two turns at a time in the sequence shown to ensure that the rockers do not bind on the valves Specified Torque 8x1.25 mm 22 Nm (2.2 kgf m, 16 lbf.ft)
  13. Install the injector base (A) Always use a new gasket(B)
  14. Apply new engine oil to the threads of the camshaft pulley mounting bolt (A) Install the back cover (B), then install the camshaft pulley (C)
  15. Set the camshaft pulleys to top dead center (TDC) before bolting them onto the engine block (see step 6 on «CYLINDER HEAD INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )

Scheme 326

Scheme 326: Rear
Scheme 326: Rear

Scheme 327

Scheme 327
Scheme 327

Scheme 328

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Scheme 328

Scheme 329

Scheme 329
Scheme 329

Scheme 330

Scheme 330
Scheme 330
  1. Loosen the locknuts and the adjusting screws
  2. Dry the camshaft oil seal housing
  3. Apply a light coat of new engine oil to the lip of the camshaft oil seal
  4. Gently tap the new camshaft oil seal (A) into the cylinder head Tap the camshaft oil seal in squarely Install the oil seal about 0.5-15 mm (0.02-0.06 in) below the surface of the cylinder head
  5. Insert the camshaft (B) into the cylinder head, then install the camshaft thrust cover (C) Always use a new O-ring (D) Apply new engine oil to the journals and the cam lobes
  6. Check that the oil seal lips are not distorted
  7. Install the hollow dowel pin (E)
  8. If the rocker arm assembly is disassembled, reassemble the rocker arm assembly (see «REAR»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  9. Remove all of the old liquid gasket from the rocker shaft holder and the cylinder head
  10. Apply liquid gasket, P/N 08717-0004, 08718-0003, or 08718-0009, evenly to the rocker shaft holder mating surface of the cylinder head Install the component within 5 minutes of applying the liquid gasket NOTE: Apply a 2.5 mm (0.98 in) diameter bead of liquid gasket along the broken line If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply the new liquid gasket
  11. Set the rocker arm assembly in place, and loosely install the bolts Make sure that the rocker arms are properly positioned on the valve stems NOTE: Wait at least 30 minutes before filling the engine with oil. Do not run the engine for at least 3 hours after installing the rocker arm assembly
  12. Tighten each bolt two turns at a time in the sequence shown to ensure that the rockers do not bind on the valves Specified Torque 8x1.25 mm. 22 N m (2.2 kgf m, 16 lbf ft)
  13. Install the injector base (A) Always use a new gasket(B)
  14. Apply new engine oil to the threads of the camshaft pulley mounting bolt (A) Install the back cover (B), then install the camshaft pulley (C)
  15. Set the camshaft pulleys to TDC before bolting them onto the engine block (see step 6 on «CYLINDER HEAD INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )

Scheme 331

Scheme 331: Cylinder Head Installation
Scheme 331: Cylinder Head Installation

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Scheme 341

Scheme 341
Scheme 341
  1. Clean the cylinder head and the engine block surface
  2. Clean and install the oil control orifices (A) with new O-rings (B)
  3. Install the dowel pins (C) and the new cylinder head gaskets (D)
  4. Clean the timing belt pulleys, the timing belt guide plate, and the upper and lower covers
  5. Set the timing belt drive pulley to top dead center (TDC) by aligning the TDC mark (A) on the tooth of the timing belt drive pulley with the pointer (B) on the oil pump
  6. Set the camshaft pulleys to TDC by aligning the TDC marks (A) on the camshaft pulleys with the pointers (B) on the back covers FRONT REAR
  7. Install the cylinder heads on the engine block
  8. Measure the diameter of each cylinder head bolt at point A and point B
  9. If either diameter is less than 113 mm (0.44 in), replace the cylinder head bolt
  10. Apply new engine oil to the threads and under the bolt heads of all cylinder head bolts
  11. Tighten the cylinder head bolts in sequence to 29 N m (3.0 kgf.m, 22 lbf.ft) using a beam-type torque wrench When using a preset click-type torque wrench, be sure to tighten slowly and do not overtighten If a bolt makes any noise while you are torquing it, loosen the bolt and retighten it from the first step. FRONT REAR
  12. After torquing, tighten all cylinder head bolts in two steps (90 ° per step) using the sequence shown in step 11 If you are using a new cylinder head bolt, tighten the bolt an extra 90 ° NOTE: Remove the cylinder head bolt if you tightened it beyond the specified angle, and go back to step 8 of the procedure Do not loosen it back to the specified angle
  13. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-installation) )
  14. Adjust the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__valve-clearance-adjustment) )
  15. Install the cylinder head covers (see «CYLINDER HEAD COVER INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  16. Install the water passage (see «WATER PASSAGE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  17. Install the injector bases (see «INJECTOR BASE REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  18. Install the connector bracket to the front cylinder head
  19. Install the evaporative emission (EVAP) canister joint with the bracket (see step 9 under Rear Camshaft Replacement)
  20. Install the engine mount control solenoid valve bracket to the rear cylinder head
  21. Connect the fuel feed hose (A) (see «FUEL LINE/QUICK-CONNECT FITTING INSTALLATION»(/acura/tl/iv-2008-2011/remont/fuel-system/#fuel-supply-system) ), then install the quick-connect fitting cover (B)
  22. Install the front warm up three way catalytic converter (front WU-TWC) (see «WARM UP TWC REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ) and the rear warm up three way catalytic converter (rear WU-TWC) (see «REAR (BANK 1)»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#catalytic-converter-system) )
  23. Connect the following engine wire harness connectors, and install the wire harness clamps to the cylinder head Six injector connectors Knock sensor connector Engine coolant temperature (ECT) sensor 1 connector Engine mount control solenoid valve connector Camshaft position (CMP) sensor connector Rocker arm oil control solenoid connector Rocker arm oil pressure switch connector Two air fuel ratio (A/F) sensor connectors Two secondary heated oxygen sensor (secondary HO2S) connectors
  24. Install the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  25. Install the intake manifold (see «INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#intake-manifold-and-exhaust-system) )
  26. Install the alternator (see «INSTALLATION»(/acura/tl/iv-2008-2011/remont/charging-system/#charging-system) )
  27. Do the battery terminal reconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
  28. After installation, check that all tubes, hoses, and connectors are installed correctly
  29. Inspect for fuel leaks Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode (do not operate the starter) so the fuel pump runs for about 2 seconds and pressurizes the fuel line Repeat this operation three times, then check for fuel leakage at any point in the fuel line
  30. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater valve open (see step 9 on «COOLANT REPLACEMENT»(/acura/tl/iv-2008-2011/remont/cooling-system-mechanical/#cooling-system) )
  31. Check for fluid leaks
  32. Do the powertrain control module (PCM) idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) )
  33. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) )
  34. Inspect the idle speed (see «IDLE SPEED INSPECTION»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#idle-control-system__idle-speed-inspection) )
  35. Inspect the ignition timing (see «IGNITION TIMING INSPECTION»(/acura/tl/iv-2008-2011/remont/ignition-system/#ignition-system) )
  36. Install the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) )

Camshaft Oil Seal Installation - In Car

Special Tools Required

Ball joint remover/installer 07GAF-SD40330

  1. Remove the timing belt (see «Timing Belt Removal»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4) )
  2. Remove the camshaft pulley and the back cover (see step 18 under Cylinder Removal)
  3. Remove the camshaft oil seal
  4. Clean and dry the camshaft oil seal housing
  5. Apply a light coat of new engine oil to the lip of the camshaft oil seal
  6. Using the ball joint remover/installer (A), a washer (B), and a 12 x 75 x 1.25 mm bolt (C), press in the new camshaft oil seal (D) about 0.5-1.5 mm (0.02-0.06 in) below the surface of the cylinder head
  7. Apply new engine oil to the threads of the camshaft pulley mounting bolt, install the back cover, then install the camshaft pulley Front (see step 14 under Front Camshaft, Rocker Arm Assembly, Camshaft Seal, and Pulley Installation) Rear (see step 14 ) under Rear Camshaft, Rocker Arm Assembly, Camshaft Seal, and Pulley Installation)
  8. Install the timing belt (see «Timing Belt Replacement»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j37a4__timing-belt-replacement) )

Sealing Bolt Installation

Note. When installing the sealing bolts (A), always use a new washer (B)

FRONT

Scheme 342

Scheme 342: Sealing Bolt Installation
Scheme 342: Sealing Bolt Installation

REAR

Scheme 343

Scheme 343
Scheme 343

See also:
• GENERAL TROUBLESHOOTING INFORMATION
• DLC CIRCUIT TROUBLESHOOTING
• IGNITION COIL REMOVAL/INSTALLATION
• ECM/PCM RESET
• FRONT SPLASH SHIELD REPLACEMENT
• DRIVE BELT REPLACEMENT
• ENGINE COMPARTMENT COVER REPLACEMENT
• DRIVE BELT AUTO-TENSIONER REPLACEMENT
• REMOVAL
• FRAME BRACE REPLACEMENT
• FUEL PRESSURE RELIEVING
• BATTERY TERMINAL DISCONNECTION AND RECONNECTION
• COOLANT CHECK
• WARM UP TWC REMOVAL/INSTALLATION
• FUEL LINE/QUICK-CONNECT FITTING REMOVAL
• EGR VALVE REPLACEMENT
• THROTTLE BODY CLEANING
• PCM IDLE LEARN PROCEDURE
• IDLE SPEED INSPECTION
• TIMING BELT DRIVE PULLEY REPLACEMENT
• VALVE CLEARANCE ADJUSTMENT
• CRANKSHAFT PULLEY REMOVAL AND INSTALLATION
• TIMING BELT REPLACEMENT
• TIMING BELT INSTALLATION
• ROCKER ARM ASSEMBLY REMOVAL
• CYLINDER HEAD REMOVAL
• VALVE, SPRING, AND VALVE SEAL REMOVAL

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