Cylinder Head Assembly: Service and Repair

Fig. 17 Cylinder Head Replacement:

Refer to Fig. 17, for the following cylinder head replacement procedure.

1. Relieve fuel system pressure as outlined under Technician Safety Information. On models with airbag system, refer to Technician Safety Information for system disarming and arming procedures.
2. Disconnect battery ground cable, then mark hood hinge positions on hood for installation reference.
3. Remove engine hood, then drain radiator coolant.
4. Position engine timing mark at 0° TDC.
5. Remove throttle cable from throttle valve.
6. Remove air cleaner and air duct assembly.
7. Mark vacuum hose for installation reference, then disconnect vacuum hoses from engine.
8. Remove air pump switching valve and hoses.
9. Disconnect engine harness connectors from right side wheelwell.
10. Mark engine electrical connectors for installation reference, then disconnect electrical connectors from engine assembly.
11. Disconnect exhaust pipe from exhaust manifold.
12. Remove air pump and bracket, then the drive belts.
13. Remove engine cooling fan. It is not necessary to remove fan from vehicle. Store fan in radiator shroud.
14. Remove A/C compressor drive belt tensioner, then the water pump drive belt pulley.
15. Remove starter motor, then install flywheel holder tool No. J-38674, or equivalent.
16. Remove crankshaft pulley retaining bolt, then the crankshaft pulley.
17. Remove timing belt covers, then the timing belt.
18. Remove camshaft pulley, then the front plate.
19. Remove valve cover, then the rocker arm assembly.
20. Remove camshaft, then the cylinder head bolts.
21. Remove cylinder with manifolds from vehicle.

Fig. 10 Cylinder head tightening sequence:

Fig. 11 Rocker arm tightening sequence:

22. Reverse procedure to install, noting the following:
a. Apply engine oil to thread and seating surface of cylinder head bolts prior to installation.
b. Torque cylinder head bolts to 58-72 ft. lbs. in sequence shown, Fig. 18.
c. Torque rocker arm assembly bolts 1 through 8 to 16 ft. lbs., then bolts 9 and 10 to 6 ft. lbs. in sequence shown, Fig. 19.
d. Tighten to specifications.
23. On models equipped with airbag system, refer to Technician Safety Information for system disarming and arming procedures.