Valve Rocker Arm Cover Replacement - Left

Repair Instructions



Valve Rocker Arm Cover Replacement - Left

Removal Procedure
1. Remove the fuel injector sight shield.





2. Disconnect the left side spark plug wires (1) from the retainers (2).





3. Remove the bolt (2) and the spark plug wire support (1).





4. Disconnect the positive crankcase ventilation (PCV) foul air pipe (4) from the PCV valve.





5. Remove the oil filler cap from the valve rocker arm cover.





6. Notice: Valve rocker arm cover gasket and sealant must be carefully trimmed away from lower intake manifold gasket. Failure to do so will damage the lower intake manifold gasket, causing a severe oil leak.

Loosen the valve rocker arm cover bolts.





7. Important: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.

Remove the valve rocker arm cover. Bump the end of the valve rocker arm cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.
8. Trim the valve cover gasket and sealant away from the lower intake manifold gasket at the cylinder head to the lower intake manifold joints (1).
9. Remove the rocker arm cover gasket.
10. Clean the sealing surface on the cylinder head with degreaser.
11. Clean the valve rocker arm cover.

Installation Procedure





1. Important: All gasket mating surfaces need to be free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.

Important: Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent, at the cylinder head to lower intake manifold joint.

Apply sealant at the cylinder head to lower intake manifold joints (1).





2. Install a new gasket to the valve rocker arm cover. Ensure the gasket is properly seated in the groove of the valve rocker arm cover.

3. Notice: Refer to Fastener Notice in Service Precautions.

Install the valve rocker arm cover.
^ Tighten the bolts to 10 Nm (89 inch lbs.).





4. Install the oil filler cap to the valve rocker arm cover.





5. Connect the PCV foul air pipe (4) to the PCV valve.





6. Install the spark plug wire support (1) and bolt (2).
^ Tighten the bolt to 25 Nm (18 ft. lbs.).





7. Connect the left side spark plug wires (1) to the spark plug wire retainers (2).
8. Install the fuel injector sight shield.