Valve Cover: Service and Repair

CYLINDER HEAD COVER:

General:
- The cylinder head cover gaskets and seals should be replaced whenever the cover has been removed. One installation compresses the gaskets, and reusing them risks leaks.

To Remove and Install:

Cylinder Head & Related Components:

1. Disconnect the spark plug wire connectors.
2. Disconnect the intake air boot from between the air flow sensor and the throttle body.
3. Disconnect the electrical connector for the charcoal canister control valve, and the large vacuum hose from the back of the upper intake manifold.
4. Remove the support bolt from the back of the upper intake manifold, then remove the five nuts and washers that join the upper intake manifold to the lower intake manifold.
5. Rotate the upper manifold up and away from the engine. Remove and label electrical connections or vacuum hoses as required. Then secure the manifold out of the way.
6. Remove the two inner bolts and the six outer bolts from the cover, and lift the cover from the cylinder head. If necessary, use a soft-faced hammer to carefully loosen the cover.

CAUTION: Use care to dislodge stuck cover gaskets. Damage to either sealing surface will cause leaks. Use a proper gasket removing tool.

7. Install in reverse order of removal. Make certain that the seals are in proper position at either end of the cylinder head. Torque the manifold support bolt last.

Tightening Torques:
Cylinder head cover (bolts): 10 Nm (89 in lb)
Intake manifold (nuts): 20 Nm (15 ft lb)
Intake manifold support (bolt): 20 Nm (15 ft lb)