Valve Rocker Arm Cover Replacement (Left)

Valve Rocker Arm Cover Replacement - Left

Removal Procedure
1. Partially drain the cooling system.
2. Remove the left spark plug wires.
3. Remove the right engine mount strut at the engine.
4. Remove the thermostat bypass hose and the pipe.
5. Remove the positive crankcase ventilation (PCV) valve from the left valve rocker arm cover.





6. Important: The valve rocker arm cover gasket sealant must be trimmed away from the lower intake manifold gasket. Failure to do so may damage the lower intake manifold gasket, causing a severe oil leak.

Remove 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 left valve rocker arm cover. Bump the end of the 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 lower intake manifold joints (1).
9. Clean the sealing surface on the cylinder head with degreaser.
10. Clean the valve rocker arm cover.

Installation Procedure





1. Install a new left valve rocker arm cover gasket to the valve rocker arm cover.
2. Apply sealant GM P/N 12378577 (Canadian P/N 89022195) or equivalent at the cylinder head to lower intake manifold joint at the rear of the lower intake manifold (1).





3. Apply sealant GM P/N 12378577 (Canadian P/N 89022195) or equivalent at the cylinder head to lower intake manifold joint at the front of the lower intake manifold (1).





4. Install the left valve rocker arm cover.

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

Install the valve rocker arm cover bolts.
^ Tighten the bolts to 10 Nm (89 inch lbs.).
6. Install the PCV valve to the left valve rocker arm cover.
7. Install the thermostat bypass hose and pipe.
8. Install the right engine mount strut.
9. Install the left spark plug wires.
10. Fill the cooling system.