Valve Cover: Service and Repair

REMOVAL





Figure 12





Figure 13

Die-cast magnesium cylinder head covers (Fig. 13) reduce noise and provide a good sealing surface. A steel backed silicon gasket is used with the cylinder head cover (Fig. 12).
1. Disconnect the negative cable from the battery.
2. Disconnect closed ventilation system and evaporation control system from cylinder head cover. Identify each system for installation.
3. Remove the upper intake manifold to remove the right side head cover.
4. Remove cylinder head cover bolts and stud bolts. Remove the covers and gaskets (Fig. 12). The gasket may be used again.

CLEANING
Clean cylinder head cover gasket surface.
Clean head rail, if necessary

INSPECTION
Inspect cover for distortion and straighten, if necessary.
Check the gasket for use in head cover installation. If damaged, use a new gasket.

INSTALLATION
1. Check the gasket for use in head cover installation. If damaged, use a new gasket.
2. Install the gasket onto the head rail. For the left side the number tab is at the front of engine with the number up. For the right side the number tab is at the rear of engine with the number up.

CAUTION: The cylinder head cover fasteners have a special plating. DO NOT use alternative fasteners.

3. Position the cylinder head cover onto the gasket. Install the stud bolts and hex head bolts in the proper positions (Fig. 13). Tighten the stud bolts and the bolts to 16 Nm (144 inch lbs.) torque.
4. If removed, install the upper intake manifold.
5. Install closed crankcase ventilation system and evaporation control system onto the proper head cover. DO NOT switch the systems.
6. Connect the negative cable to the battery.
7. Start engine and check for leaks.