Cylinder Head Acura TL III рестайлинг

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Engine Compression Inspection

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

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1. Warm up the engine to normal operating temperature (cooling fan comes on).
2. Turn the ignition switch OFF.
3. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
4. Turn the ignition switch ON (II).
5. Make sure the HDS communicates with the vehicle and the ECM/PCM. If it doesn't communicate, troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING (PART 2)»(/acura/tl/iii-2006-2008/remont/testing-diagnostics/#pgm-fi-system) ).
6. Select PGM-FI, INSPECTION, then ALL INJECTORS OFF on the HDS.
7. Turn the ignition switch OFF.
8. Remove the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/ignition-system/#ignition-system) ).
9. Remove the six spark plugs.
10. Attach the compression gauge to the spark plug hole.
11. Open the throttle fully, then crank the engine with the starter motor, and measure the compression. Compression Pressure: Above 930 kPa (9.5 kgf/cm 2 , 135 psi)
12. Measure the compression on the remaining cylinders. Maximum Variation: Within 200 kPa (2.0 kgf/cm 2 , 28 psi)
13. If the compression is not within specifications, check the following items, then remeasure the compression. Damaged or worn valves and seats Damaged cylinder head gasket Damaged or worn piston rings Damaged or worn piston and cylinder bore
14. Select ECM/PCM reset (see «ECM/PCM RESET»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__ecmpcm-reset) ) to cancel the ALL INJECTORS OFF function on the HDS.

VTEC Rocker Arm Test

Special Tools Required

1. VTEC air adapter 07VAJ-P8A010A
2. VTEC air stopper 070AJ-0030100
3. Air pressure regulator 07AAJ-PNAA101

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1. Start the engine and let it run for 5 minutes, then turn the ignition switch OFF.
2. Remove the cylinder head covers (see «CYLINDER HEAD COVER REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
3. Set the No. 1 piston at top dead center (TDC) (see step 3 on «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ).
4. Push on the intake mid rocker arm (A) for the No. 1 cylinder. The mid rocker arm should move independently of the primary rocker arm (B) and secondary rocker arm (C). If the mid rocker arm moves freely, go to step 5. If the intake mid rocker arm does not move, remove the mid, primary, and secondary intake rocker arms as an assembly, then check that the pistons in the mid and primary rocker arms move smoothly. If any rocker arm needs replacing, replace the primary, mid, and secondary rocker arms as an assembly, then retest.
5. Repeat step 4 on the remaining intake mid rocker arms with each piston at TDC. When all the mid rocker arms pass the test, go to step 6.
6. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.0 kgf/cm 2 , 100 psi).
7. Inspect the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ).
8. Remove the No. 1 and No. 6 intake rocker shaft mounting bolts, then install the VTEC air adapter and VTEC air stopper, and connect the air pressure regulator. FRONT: REAR
9. Loosen the valve on the regulator, and apply the specified air pressure. Specified Air Pressure: 440-540 kPa (4.5-5.5 kgf/cm 2 , 64-78 psi) NOTE: If the rocker arm pistons do not move after applying air pressure, move the primary or secondary rocker arm up and down manually.
10. Make sure that the intake primary rocker arm (A) and intake secondary rocker arm (B) are mechanically connected by the piston and that the mid rocker arm (C) does not move when pushed manually. If any intake mid rocker arm moves independently of the primary and secondary rocker arms, replace the rocker arms as a set.
11. Remove the VTEC air adapter and VTEC air stopper.
12. Tighten the rocker shaft bolts to 24 N.m (2.4 kgf.m, 18 lbf-ft)
13. Install the cylinder head covers (see «CYLINDER HEAD COVER INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).

Valve Clearance Adjustment

Note. Adjust the valves only when the cylinder head temperature is less than 100 ° (38°C).

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1. Remove the right side engine compartment cover (see step 1 on «TIMING BELT INSPECTION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Remove the cylinder head covers (see «CYLINDER HEAD COVER REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
3. 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.
4. Select the correct thickness feeler gauge for the valves you're 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
5. 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.
6. If you feel too much or too little drag, loosen the locknut (A), and turn the adjusting screw (B) until the drag on the feeler gauge is correct.
7. Tighten the locknut and recheck the clearance. Repeat the adjustment, if necessary.
8. 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.
9. Check and, if necessary, adjust the valve clearance on No. 4 cylinder.
10. 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.
11. Check and, if necessary, adjust the valve clearance on No. 2 cylinder.
12. 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.
13. Check and, if necessary, adjust the valve clearance on No. 5 cylinder.
14. 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.
15. Check and, if necessary, adjust the valve clearance on No. 3 cylinder.
16. 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.
17. Check and, if necessary, adjust the valve clearance on No. 6 cylinder.
18. Install the cylinder head covers (see «CYLINDER HEAD COVER INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
19. Install the right side engine compartment cover (see step 81 on «ENGINE INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation__engine-installation) ).

Crankshaft Pulley Removal and Installation

Special Tools Required

1. Holder handle 07JAB-001020A
2. Holder attachment, 50 mm, offset 07MAB-PY3010A
3. Socket, 19 mm 07JAA-001020A, or a commercially available 19 mm socket

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1. Remove the right front wheel.
2. Remove the splash shield.
3. Remove the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system__drive-belt-replacement) ).
4. Hold the crankshaft pulley with the holder handle (A) and holder attachment (B).
5. Remove the bolt with a heavy duty 19 mm socket (C) and breaker bar, then remove the crankshaft pulley.

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1. Remove any oil and clean the pulleys (A), crankshaft (B), bolt (C), and 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 holder attachment (B). Torque the bolt to 65 N.m (6.5 kgf.m, 48 lbf.ft) with a torque wrench and heavy duty 19 mm socket (C). Mark the bolt head (D) and 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 INSPECTION»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system) ).
4. Install the splash shield (see step 43 on «ENGINE INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation__engine-installation) ).
5. Install the right front wheel. NOTE: On J35A8 engine, be careful not to damage or chip the paint of the brake calipers when installing the wheel.

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1. Remove the right side engine compartment cover.
2. Remove the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system__drive-belt-replacement) ).
3. Remove the front upper cover.
4. Inspect the timing belt for cracks and oil or coolant contamination. Replace the belt if it is cracked, or is contaminated with oil or coolant. Wipe off any oil or solvent that gets on the belt.

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1. Remove the right side engine compartment cover (see step 1 on «TIMING BELT INSPECTION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Turn the crankshaft so its white mark (A) on the crankshaft pulley lines up with the pointer (B).
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. Remove the right front wheel.
5. Remove the splash shield.
6. Remove the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system__drive-belt-replacement) ).
7. Support the engine with a jack and 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/iii-2006-2008/remont/mechanical/#cylinder-head__crankshaft-pulley-removal-and-installation) ).
10. Remove the front upper cover (A) and 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 in the battery clamp bolt 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 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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1. Clean the timing belt pulleys, 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 and 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/iii-2006-2008/remont/mechanical/#cylinder-head__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 rear upper cover (B).
13. Install the crankshaft pulley (see «INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
14. Rotate the crankshaft pulley 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).
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), and tighten the bolts in the numbered sequence shown.
18. Install the ground cable (B).
19. Install the drive belt (see «DRIVE BELT INSPECTION»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system) ).
20. Install the splash shield (see step 43 on «ENGINE INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation__engine-installation) ).
21. Install the right front wheel. NOTE: On J35A8 engine, be careful not to damage or chip the paint of the brake calipers when installing the wheel.
22. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).

Timing Belt Replacement

Note. The following procedure is for the installation of 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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1. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Clean the timing belt pulleys, 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 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 (A) stays in place.
10. Thread in the battery clamp bolt 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. 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)
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 rear upper cover (B).
20. Install the crankshaft pulley (see «INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
21. Rotate the crankshaft pulley 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).
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 bolts in the numbered sequence shown.
25. Install the ground cable (B).
26. Install the drive belt (see «DRIVE BELT INSPECTION»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system) ).
27. Install the splash shield (see step 43 on «ENGINE INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation__engine-installation) ).
28. Install the right front wheel. NOTE: On J35A8 engine, be careful not to damage or chip the paint of the brake calipers when installing the wheel.
29. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).

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1. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Remove the auto-tensioner.
3. Remove the bolt (A), then remove the timing belt adjuster (B) and collar (C).
4. Install the timing belt adjuster in the reverse order of removal.
5. Replace the timing belt (see «TIMING BELT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__timing-belt-replacement) ).

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1. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Remove the crankshaft position (CKP) sensor (see «CKP SENSOR REPLACEMENT»(/acura/tl/iii-2006-2008/remont/testing-diagnostics/#pgm-fi-system) ).
3. Remove the timing belt drive pulley.
4. Install the new timing belt drive pulley.
5. Install the CKP sensor (see «CKP SENSOR REPLACEMENT»(/acura/tl/iii-2006-2008/remont/testing-diagnostics/#pgm-fi-system) ).
6. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__timing-belt-installation) ).

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1. Remove the intake manifold (see «REMOVAL»(/acura/tl/iii-2006-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).
2. Remove the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/ignition-system/#ignition-system) ).
3. Remove the three bolts (A) securing the harness holder, and remove the dipstick (B).
4. Remove the bolt (A) securing the power steering (P/S) hose bracket.
5. Remove the two bolts (B) securing the harness holder.
6. Disconnect the breather hose (C).
7. Remove the cylinder head covers. FRONT: REAR

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1. Check the spark plug seals for damage. If the seal is damaged, replace it.
2. Thoroughly clean the head cover gasket and the groove of the cylinder head cover.
3. Clean the head cover contacting surfaces with a shop towel.
4. Install the head cover gasket (A) in the groove of the cylinder head cover (B). Make sure the head cover gasket is seated securely, then install new spark plug seals (C) on the spark plug tubes, and install the cylinder head covers. FRONT: REAR
5. Visually check the spark plug seals for damage.
6. Install new cover washers (D).
7. Tighten the bolts in three steps. In the final step tighten all of the bolts, in sequence, 12 N.m (1.2 kgf.m, 8.8 lbf.ft) (front cover shown).
8. Install the breather hose (A).
9. Tighten the two bolts (B) securing the harness holder.
10. Tighten the bolts (C) securing the power steering (P/S) hose bracket.
11. Tighten the three bolts (A) securing the harness holder, and install the dipstick (B).
12. Install the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/ignition-system/#ignition-system) ).
13. Install the intake manifold (see «INSTALLATION»(/acura/tl/iii-2006-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).

Note. Use fender covers to avoid damaging painted surfaces. To avoid damaging the wires and terminals, unplug the wiring connectors carefully while holding the connector portion. To avoid damaging the cylinder head, wait until the engine coolant 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 other wiring or hoses, or interfere with other parts.

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1. Make sure you have the anti-theft codes for the audio system and the navigation system (if equipped). Make sure the ignition switch is OFF.
2. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/tl/iii-2006-2008/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
3. Disconnect the negative cable from the battery.
4. Drain the engine coolant (see «COOLANT CHECK»(/acura/tl/iii-2006-2008/remont/cooling-system-mechanical/#cooling-system) ).
5. Remove the front warm up three way catalytic converter (front WU-TWC) (see «WARM UP TWC REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ) and rear warm up three way catalytic converter (rear WU-TWC) (see «REAR (BANK 1)»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ).
6. Remove the drive belt (see «DRIVE BELT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system__drive-belt-replacement) ).
7. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
8. Remove the power steering (P/S) pump (A), and P/S hose bracket (B).
9. Remove the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system) ).
10. Remove the intake manifold (see «REMOVAL»(/acura/tl/iii-2006-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).
11. Remove the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/ignition-system/#ignition-system) ).
12. Remove the engine wire harness connectors and wire harness clamps from the cylinder head. Six injector connectors Engine coolant temperature (ECT) sensor 1 connector Camshaft position (CMP) sensor connector Crankshaft position (CKP) sensor connector Exhaust gas recirculation (EGR) valve connector Rocker arm oil control solenoid connector Rocker arm oil pressure switch connector Oil pressure switch connector Two air fuel ratio (A/F) sensor connectors Two secondary heated oxygen sensor (secondary HO2S) connectors
13. Remove the upper radiator hose (A) and lower radiator hose (B).
14. Disconnect the heater hose (A), water bypass hose (B), and remove the ground cable (C).
15. Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see «FUEL LINE/QUICK-CONNECT FITTING REMOVAL»(/acura/tl/iii-2006-2008/remont/fuel-system/#fuel-supply-system__fuel-linequick-connect-fitting-removal) ).
16. Remove the fuel rails (see «INJECTOR REPLACEMENT»(/acura/tl/iii-2006-2008/remont/testing-diagnostics/#pgm-fi-system) ).
17. Remove the bolt securing the connector bracket.
18. Remove the bolt securing the harness clamp bracket.
19. Remove the water passage.
20. Remove the front and rear camshaft pulleys (A) and front and rear back covers (B).
21. Remove the cylinder head covers (see «CYLINDER HEAD COVER REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
22. Remove the cylinder head bolts. To prevent warpage, loosen the bolts in sequence 1/3 turn at a time; repeat the sequence until all the bolts are loose.
23. Remove the cylinder heads.

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1. Make sure you have the anti-theft codes for the audio system and the navigation system (if equipped). Make sure the ignition switch is OFF.
2. Remove the left side engine compartment cover (see step 3 on «ENGINE REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation) ).
3. Disconnect the negative cable from the battery, then disconnect the positive cable.
4. Remove the battery.
5. Drain the engine coolant (see «COOLANT CHECK»(/acura/tl/iii-2006-2008/remont/cooling-system-mechanical/#cooling-system) ).
6. Remove the upper radiator hose.
7. Remove the exhaust gas recirculation (EGR) valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#egr-system) ).
8. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
9. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
10. Remove the front camshaft pulley (see step 20 on «CYLINDER HEAD REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
11. Remove the thrust cover (A), then remove the front camshaft (B).
12. 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 cam lobes.
13. Apply new engine oil to the threads of the camshaft pulley mounting bolt, then install the front camshaft pulley (see step 10 on «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
14. Install the rocker arm assembly, then tighten the mounting bolts (see step 8 on «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
15. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__timing-belt-installation) ).
16. Adjust the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ).
17. Install the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#egr-system) ), then install the upper radiator hose.
18. Install the battery. Clean the battery posts and cable terminals, then assemble them and apply grease to prevent corrosion.
19. Fill the radiator with engine coolant and bleed the air out (see step 8 on «COOLANT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/cooling-system-mechanical/#cooling-system) ).
20. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
21. Enter the anti-theft codes for the audio system and the navigation system (if equipped).
22. Set the clock (on vehicles without navigation).

Scheme 129

Scheme 130

1. Make sure you have the anti-theft codes for the audio system and the navigation system (if equipped). Make sure the ignition switch is OFF.
2. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/tl/iii-2006-2008/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
3. Disconnect the negative cable from the battery.
4. Remove the under-hood fuse/relay box (see step 15 on «ENGINE REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation) ).
5. Drain the engine coolant (see «COOLANT CHECK»(/acura/tl/iii-2006-2008/remont/cooling-system-mechanical/#cooling-system) ).
6. Disconnect the heater hose (A) and evaporative emission (EVAP) canister purge valve joint (B).
7. Remove the quick-connect fitting cover, then disconnect the fuel feed hose (see step 18 on «ENGINE REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation) ).
8. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
9. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
10. Remove the rear camshaft pulley (see step 20 on «CYLINDER HEAD REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
11. Remove the thrust cover (A), then remove the rear camshaft (B).
12. 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.
13. Apply new engine oil to the threads of the camshaft pulley mounting bolt, then install the rear camshaft pulley (see step 10 on «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
14. Install the rocker arm assembly, then tighten the mounting bolts (see step 8 on «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
15. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__timing-belt-installation) ).
16. Adjust the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ).
17. Connect the fuel feed hose, then install the quick-connect fitting cover (see step 57 on «ENGINE INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation__engine-installation) ).
18. Install the heater hose and EVAP canister purge valve joint.
19. Install the under-hood fuse/relay box (see step 60 on «ENGINE INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#engine-removal-and-installation__engine-installation) ).
20. Connect the negative cable to the battery.
21. Inspect for fuel leaks. Turn the ignition switch ON (II) (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.
22. Fill the radiator with engine coolant and bleed the air out (see step 8 on «COOLANT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/cooling-system-mechanical/#cooling-system) ).
23. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
24. Enter the anti-theft codes for the audio system and the navigation system (if equipped).
25. Set the clock (on vehicles without navigation).

Scheme 131

1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Inspect the camshaft (see «CAMSHAFT INSPECTION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
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.)

Scheme 132

Scheme 133

1. Remove the cylinder head cover (see «CYLINDER HEAD COVER REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Loosen the adjusting screws (A).
3. Remove the bolts and the rocker arm assembly. Loosen the rocker shaft mounting bolts in sequence two turns at a time, to prevent damaging the valves or rocker arm assembly. When removing the rocker arm assembly, do not remove the rocker shaft mounting bolts. The bolts will keep the springs and the rocker arms on the shafts.

Rocker Arm and Shaft Disassembly/Reassembly

Note. Identify parts as they are removed so they can be reinstalled in their original locations. Inspect the rocker shafts and 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 rocker shaft mounting bolts. The bolts will keep the springs and rocker arms on the shaft. Bundle the intake rocker arms with rubber bands to keep them together as a set. Prior to reassembling, clean all the parts in solvent, dry them and apply new engine oil to any contact points. When replacing the intake rocker arm assembly, remove the fastening hard wear from the new intake rocker arm assembly.

Scheme 134

Scheme 135

Scheme 136

Scheme 137

1. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Disassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__rocker-arm-and-shaft-disassemblyreassembly) ).
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. M/T model Intake Rocker Arm-to-Shaft Clearance Standard (New): 0.026-0.067 mm (0.0010-0.0026 in.) Service Limit: 0.067 mm (0.0026 in.) Exhaust Rocker Arm-to-Shaft Clearance Standard (New): 0.026-0.067 mm (0.0010-0.0026 in.) Service Limit: 0.067 mm (0.026 in.) A/T model Intake Rocker Arm-to-Shaft Clearance Standard (New): 0.026-0.067 mm (0.0010-0.0026 in.) Service Limit: 0.067 mm (0.0026 in.) Exhaust Rocker Arm-to-Shaft Clearance Standard (New): 0.026-0.077 mm (0.0010-0.0030 in.) Service Limit: 0.077 mm (0.0030 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 intake rocker arm needs replacement, replace all three rocker arms in that set (primary, mid, and secondary). VTEC Rocker Arms
7. Inspect the rocker arm rocker arm pistons (A). Push them manually. If they do not move smoothly, replace the rocker arm set. NOTE: Apply new engine oil to the rocker arm pistons when reassembling. When reassembling the primary rocker arm (B), carefully apply air pressure to the oil passage of the rocker arm.
8. Reassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__rocker-arm-and-shaft-disassemblyreassembly) ).
9. Install the rocker arm assembly (see «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).

Scheme 138

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Scheme 144

Scheme 145

Scheme 146

1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Remove the rocker arms (see «ROCKER ARM ASSEMBLY REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
3. Put the rocker shafts on the cylinder head, then tighten the bolts to the specified sequence. NOTE: Apply new engine oil to the threads and flange of the exhaust rocker shaft mounting bolts. Specified Torque 8 x 1.25 mm: 24 N.m (2.4 kgf.m, 18 lbf.ft)
4. Seat the camshaft by pushing it toward the rear of the cylinder head.
5. 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.)
6. Remove the camshaft thrust cover (A), then pull out the camshaft (B).
7. Wipe the camshaft clean, then inspect the lift ramps. Replace the camshaft if any lobes are pitted, scored, or excessively worn.
8. Measure the diameter of each camshaft journal.
9. Zero the gauge to the camshaft journal diameter.
10. 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 12 . 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 11. Camshaft-to-Holder Oil Clearance Standard (New): 0.050-0.089 mm {0.0020-0.0035 in.) Service Limit: 0.15 mm (0.006 in.)
11. 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 (0.001 in.) max. Service Limit: 0.04 mm (0.002 in.)
12. Measure cam lobe height. J32A3 engine Cam Lobe Height Standard (New): CAM LOBE HEIGHT SPECIFICATIONS CHART INTAKE EXHAUST PRI 35.041 mm (1.3796 in.) 36.326 mm (1.4302 in.) MID 36.445 mm (1.4348 in.) SEC 35.284 mm (1.3891 in.) PRI: Primary IN: Intake MID: Mid EX: Exhaust SEC: Secondary T/B: Timing belt J35A8 engine Cam Lobe Height Standard (New): CAM LOBE HEIGHT SPECIFICATIONS CHART INTAKE EXHAUST PRI 35.112 mm (1.3824 in.) 36.389 mm (1.4326 in.) MID 36.394 mm (1.4328 in.) SEC 35.112 mm (1.3824 in.) PRI: Primary IN: Intake MID: Mid EX: Exhaust SEC: Secondary T/B: Timing belt

Valve, Spring, and Valve Seal Removal

Special Tools Required

Valve spring compressor attachment 07757-PJ1010A

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

Scheme 147

Scheme 148

Scheme 149

Scheme 150

1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Using an appropriate-sized socket (A) and plastic mallet (B), lightly tap the spring retainer to loosen the valve cotters.
3. Install the valve spring compressor attachment and valve spring compressor. Compress the spring and remove the valve cotters.
4. Remove the valve spring compressor, valve spring compressor attachment, spring retainer, and spring.
5. Install the valve guide seal remover (A).
6. Remove the valve seal.
7. Remove the valve spring seat and valve.

Scheme 151

1. Remove the valves (see «VALVE, SPRING, AND VALVE SEAL REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-spring-and-valve-seal-removal) ).
2. Measure the valve in these areas. J32A3 engine Intake Valve Dimensions A Standard (New): 34.90-35.10 mm (1.374-1.382 in.) B Standard (New): 115.70-116.30 mm (4.555-4.579 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.) J35A8 engine Intake Valve Dimensions A Standard (New): 35.90-36.10 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 152

1. Remove the valves (see «VALVE, SPRING, AND VALVE SEAL REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-spring-and-valve-seal-removal) ).
2. Slide the valve out of its guide about 10 mm (0.39 in.), then measure the guide-to-stem clearance with a dial indicator while rocking the stem in the direction of normal thrust (wobble method). If the measurement exceeds the service limit, recheck it using a new valve. If the measurement is now within the service limit, reassemble using a new valve. If the measurement with a new valve still exceeds the service limit, go to step 3. Intake Valve Stem-to-Guide Clearance Standard (New): 0.04-0.09 mm (0.002-0.004 in.) Service Limit: 0.16 mm (0.006 in.) Exhaust Valve Stem-to-Guide Clearance Standard (New): 0.11-0.16 mm (0.004-0.006 in.) Service Limit: 0.22 mm (0.009 in.)
3. Subtract the valve stem O.D. (measured with a micrometer) from the valve guide I.D. (measured with an inside micrometer or 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: 0.11 mm (0.004 in.)

Valve Guide Replacement

Special Tools Required

1. Valve guide driver, 5.5 mm 07742-0010100
2. Valve guide reamer, 5.5 mm 07HAH-PJ7A100

Scheme 153

Scheme 154

Scheme 155

Scheme 156

Scheme 157

1. Inspect valve stem-to-guide clearance (see «VALVE STEM-TO-GUIDE CLEARANCE INSPECTION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
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 special tool and a conventional hammer.
3. Select the proper replacement guides, and chill them in the freezer section of a refrigerator for about 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 won't 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. Take out 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 special tool 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 drawing 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/iii-2006-2008/remont/mechanical/#cylinder-head) ). 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/iii-2006-2008/remont/mechanical/#cylinder-head) ).

Scheme 158

Scheme 159

Scheme 160

Scheme 161

1. Inspect valve stem-to-guide clearance (see «VALVE STEM-TO-GUIDE CLEARANCE INSPECTION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ). If the valve guides are worn, replace them (see «VALVE GUIDE REPLACEMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-guide-replacement) ) 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 edge of the seat with the 30 ° cutter and the lower edge of the seat with the 67.5 ° cutter (intake seat) or the 60 ° cutter (exhaust seat). 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. Valve Seat Width Standard (New): 1.25-1.55 mm (0.049-0.061 in.) Service Limit: 2.00 mm (0.079 in.)
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 07PAD-0010000
2. Valve spring compressor attachment 07757-PJ1010A

Scheme 162

Scheme 163

Scheme 164

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 stem seal driver (B). NOTE: Exhaust valve seals (C) have a black spring (D) and intake valve seals (E) have a white spring (F); they are not interchangeable.
5. Install the valve spring and spring retainer. Place the end of the valve spring with closely wound coils toward the cylinder head.
6. Install the valve spring compressor attachment and valve spring compressor. Compress the spring and install the valve cotters.
7. Remove the valve spring compressor and 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 165

Scheme 166

Scheme 167

Scheme 168

1. Apply a light coat of new engine oil around the camshaft oil seal.
2. Gently tap the new camshaft oil seal (A) into the cylinder head using a seal driver. Tap the camshaft oil seal in squarely. Install the oil seal about 0.5 -1.5 mm (0.02-0.06 in.) below the surface of the cylinder head. FRONT: REAR
3. 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 cam lobes.
4. Check that the oil seal lips are not distorted.
5. Install the solid dowel pins (E) and the hollow dowel pins (F).
6. Loosen the valve adjusting screws.
7. If the rocker arm assembly is disassembled, reassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__rocker-arm-and-shaft-disassemblyreassembly) ).
8. Set the rocker arm assembly in place, and loosely install the bolts. Make sure the rocker arms are properly positioned on the valve stems.
9. Tighten each bolt two turns at a time in the sequence shown to ensure that the rockers do not bind on the valves. NOTE: Apply new engine oil to the threads and flange of the exhaust rocker shaft mounting bolts. Specified Torque 8 x 1.25 mm: 24 N.m (2.4 kgf.m, 18 lbf.ft)
10. 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).
11. Set the camshaft pulleys to top dead center (TDC) before bolting them onto the engine block (see step 7 on «CYLINDER HEAD INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).

Scheme 169

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Scheme 181

Scheme 182

1. Clean the cylinder head and block surface.
2. Clean and install the oil control orifices (A) with new O-rings (B).
3. Install the dowel pins (C) and new cylinder head gaskets (D).
4. Install the cylinder heads onto the engine block.
5. Clean the timing belt pulleys, timing belt guide plate, and the upper and lower covers.
6. 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.
7. 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
8. Measure the diameter of each cylinder head bolt at point A and point B.
9. If either diameter is less than 11.3 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. Torque the cylinder head bolts in sequence to 30 N.m (3.0 kgf.m, 22 lbf.ft). Use a beam-type torque wrench. When using a preset-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 retorque it from the first step.
12. After torquing, tighten all cylinder head bolts in two steps (90 ° per step). 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/iii-2006-2008/remont/mechanical/#cylinder-head__timing-belt-installation) ).
14. Adjust the valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ).
15. Install the cylinder head covers (see «CYLINDER HEAD COVER INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
16. Install the water passage (A). Always use a new O-ring (B) and new gaskets (C).
17. Install the front and rear warm up three way catalytic converters (WU-TWC) (see «WARM UP TWC REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ).
18. Tighten the bolt securing the connector bracket.
19. Tighten the bolt securing the harness clamp bracket.
20. Install the fuel rails (see «INJECTOR REPLACEMENT»(/acura/tl/iii-2006-2008/remont/testing-diagnostics/#pgm-fi-system) ).
21. Connect the fuel feed hose (A) (see «FUEL LINE/QUICK-CONNECT FITTING INSTALLATION»(/acura/tl/iii-2006-2008/remont/fuel-system/#fuel-supply-system__fuel-linequick-connect-fitting-installation) ), then install the quick-connect fitting cover (B).
22. Install the heater hose (A), water bypass hose (B), and ground cable (C).
23. Install the upper radiator hose (A) and lower radiator hose (B).
24. Install these engine wire harness connectors and their clamps to the cylinder head: Six injector connectors Engine coolant temperature (ECT) sensor 1 connector Camshaft position (CMP) sensor connector Crankshaft position (CKP) sensor connector Exhaust gas recirculation (EGR) valve connector Rocker arm oil control solenoid connector Rocker arm oil pressure switch connector Oil pressure switch connector Two air fuel ratio (A/F) sensor connectors Two secondary heated oxygen sensor (secondary HO2S) connectors
25. Install the power steering (P/S) pump (A) and P/S hose bracket (B).
26. Install the six ignition coils (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tl/iii-2006-2008/remont/ignition-system/#ignition-system) ).
27. Install the intake manifold (see «INSTALLATION»(/acura/tl/iii-2006-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).
28. Install the alternator (see «INSTALLATION»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system) ).
29. Install the drive belt (see «DRIVE BELT INSPECTION»(/acura/tl/iii-2006-2008/remont/charging-system/#charging-system) ).
30. Clean the battery posts and cable terminals. Assemble them and apply grease to prevent corrosion.
31. After installation, check that all tubes, hoses, and connectors are installed correctly.
32. Inspect for fuel leaks. Turn the ignition switch ON (II) (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.
33. Refill the radiator with engine coolant, and bleed air from the cooling system with the heater valve open (see step 8 on «COOLANT REPLACEMENT»(/acura/tl/iii-2006-2008/remont/cooling-system-mechanical/#cooling-system) ).
34. Do the crankshaft position (CKP) pattern clear/CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tl/iii-2006-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
35. Inspect the idle speed (see «IDLE SPEED INSPECTION»(/acura/tl/iii-2006-2008/remont/engine-control-systems/#idle-control-system__idle-speed-inspection) ).
36. Inspect the ignition timing (see «IGNITION TIMING INSPECTION»(/acura/tl/iii-2006-2008/remont/ignition-system/#ignition-system) ).
37. Enter the anti-theft codes for the audio system and the navigation system (if equipped).
38. Set the clock (on vehicles without navigation).

Camshaft Oil Seal Installation - In Car

Special Tools Required

Camshaft oil seal driver 07GAF-SD40330

Scheme 183

1. Remove the timing belt (see «TIMING BELT REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
2. Remove the camshaft pulley and back cover (see step 20 on «CYLINDER HEAD REMOVAL»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
3. Remove the camshaft oil seal.
4. Dry the camshaft oil seal housing.
5. Apply a light coat of multipurpose grease to the lip of the camshaft oil seal.
6. Using the special tool (A), washer (B), and a 12 x 75 x 1.25 mm bolt (C), press in the 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 (see step 10 on «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head) ).
8. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/tl/iii-2006-2008/remont/mechanical/#cylinder-head__timing-belt-installation) ).

Sealing Bolt Installation

Note. When installing the sealing bolt, always use a new washer.

FRONT

Scheme 184

REAR

Scheme 185

See also:
• GENERAL TROUBLESHOOTING INFORMATION
• DLC CIRCUIT TROUBLESHOOTING (PART 2)
• IGNITION COIL REMOVAL/INSTALLATION
• ECM/PCM RESET
• ENGINE INSTALLATION
• DRIVE BELT REPLACEMENT
• DRIVE BELT INSPECTION
• REMOVAL
• FUEL PRESSURE RELIEVING
• COOLANT CHECK
• WARM UP TWC REMOVAL/INSTALLATION
• FUEL LINE/QUICK-CONNECT FITTING REMOVAL
• ENGINE REMOVAL
• EGR VALVE REPLACEMENT
• FUEL LINE/QUICK-CONNECT FITTING INSTALLATION
• IDLE SPEED INSPECTION
• CYLINDER HEAD COVER REMOVAL
• VALVE CLEARANCE ADJUSTMENT
• CRANKSHAFT PULLEY REMOVAL AND INSTALLATION
• TIMING BELT REPLACEMENT
• TIMING BELT INSTALLATION
• ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY
• VALVE, SPRING, AND VALVE SEAL REMOVAL
• VALVE GUIDE REPLACEMENT