Cylinder Head Removal
REMOVALEngine removal is not required for this procedure.
WARNING: Make sure jacks and safety stands are placed properly and hoist brackets are attached the to correct positions on the engine.
CAUTION:
- Use fender covers to avoid damaging painted surfaces.
- Unplug the wiring connectors carefully while holding the connector portion to avoid damage.
- To avoid damaging the cylinder head, wait until the engine coolant temperature drops below 100°F (38°C) before loosening the retaining bolts.
NOTE:
- Mark all wiring and hoses to avoid Disconnection. Also, be sure that they do not contact other wiring or hoses, or interfere with other parts.
- Inspect the timing belt before removing the cylinder head.
- Turn the crankshaft pulley so that the No. 1 piston is at top dead center.
1. Make sure you have the anti-theft code for the radio, then write down the frequencies for the radio's preset buttons.
2. Disconnect the battery negative terminal first, then the positive terminal.
3. Drain the engine coolant.
4. Remove the engine cover.
5. Remove the intake air duct and air cleaner housing assembly.
6. Remove the throttle cover.
7. Remove the throttle cable and cruise control cable by loosening the locknuts, then slip the cable ends out of the accelerator linkage.
NOTE:
- Take care not to bend a cable when removing it. Always replace any kinked cable with a new one.
- Adjust the throttle cable when installing.
- Adjust the cruise control cable when installing.
8. Remove the upper radiator hose and water bypass hoses.
9. Remove the battery and battery base.
10. Remove the vacuum hoses, then remove the clamp from the under-hood fuse/relay box.
11. Remove the battery cables from the under-hood fuse/relay box, then remove the under-hood fuse/ relay box.
12. Remove the engine wire harness connector.
13. Disconnect the connectors, then remove the control box, vacuum hose and solenoid valve.
14. Disconnect the brake booster vacuum hose.
15. Relieve fuel pressure.
WARNING: Do not smoke while working on the fuel system. Keep open flame or spark away from the work area. Drain fuel only into an approved container.
16. Remove the fuel feed hose, fuel return hose, vacuum hose and Evaporative Emission (EVAP) control canister hose.
17. Remove the water bypass hoses and heater hose.
18. Loosen the mounting bolt, lock bolt and adjusting rod, then remove the alternator belt.
19. Loosen the idler pulley center nut and adjusting bolt, then remove the Air Conditioning (A/C) compressor belt.
20. Loosen the adjusting bolt, locknut and mounting bolt, then remove the Power Steering (P/S) pump belt.
21. Remove the engine ground cable and wire harness clamps.
22. Remove the Positive Crankcase Ventilation (PCV) hose.
23. Remove the bolt securing the Automatic Transmission Fluid (ATF) dipstick tube bracket.
24. Remove the engine wire harness connectors and wire harness clamps from the cylinder heads and intake manifold.
- Six injector connectors
- Six ignition coil connectors
- Throttle position sensor connector
- CKP/CYP sensor connector
- Intake Air Temperature (IAT) sensor connector
- Exhaust gas recirculation (EGR) valve lid sensor connector
- Idle Air Control (IAC) valve connector
- Engine Coolant Temperature (ECT) sensor connector
- ECT gauge sending unit connector
- Engine oil temperature sensor connector
- Left Primary Heated Oxygen Sensor (left primary H02S) connector
- Right Primary Heated Oxygen Sensor (right primary H02S) connector
- Evaporative Emission (EVAP) purge control solenoid valve connector.
25. Remove the inlet pipe mounting bolts from the right cylinder head cover.
26. Remove the vacuum hoses and breather hose.
27. Remove the six ignition coils from the left and right cylinder head covers.
28. Remove the TCS upper and lower brackets.
NOTE: Refer to Brakes when installing the brackets.
29. Disconnect the TCS throttle position sensor connector and TCS throttle actuator connector, then remove the TCS control valve assembly.
30. Remove the oil pressure switch connector, engine ground cable and engine wire harness cover.
31. Remove the EGR pipe, then remove the intake manifold and water passage.
NOTE: Fill the cylinder head intake ports with clean shop towels to prevent foreign materials from getting into the cylinders.
32. Remove the covers, then remove the left and right exhaust manifolds.
33. Remove the timing belt.
34. Remove the left and right camshaft pulleys, then remove the left and right back covers.
35. Remove the left and right cylinder head covers.
36. Remove the three bolts securing the alternator bracket.
37. Remove the two bolts securing the P/S pump bracket.
Cylinder Head Bolts Loosening Sequence:
38. Remove the cylinder head bolts, then remove the cylinder heads.
CAUTION: To prevent warpage, unscrew the bolts in sequence 1/3 turn at a time; repeat the sequence until all bolts are loose.