Valve Rocker Arm Cover Replacement - Left

Valve Rocker Arm Cover Replacement - Left
Removal Procedure





1. Partially drain the cooling system. Refer to Draining and Filling Cooling System.
2. Remove the intake manifold cover.
3. Disconnect the left spark plug wires from the spark plugs.
4. Remove the spark plug wire harness clip from the heater inlet and outlet front pipe bracket.
5. Remove the heater inlet and outer front pipe.





6. Disconnect the positive crankcase ventilation (PCV) foul air tube from the PCV valve.





7. Remove the valve rocker arm cover bolts.

8. 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. If necessary, 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.
9. Cut the RTV in the channel where the intake, cylinder head and valve rocker arm cover meet with a suitable tool.
10. Remove the valve cover gasket.
11. Clean the sealing surface on the cylinder head with degreaser.

Installation Procedure

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 the surfaces.





1. Install a NEW valve rocker arm cover gasket into the groove in the valve rocker arm cover. Ensure that the gasket is properly seated in the groove of the valve rocker arm cover.
2. Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent, at the cylinder head to the surfaces where the cylinder head and intake manifold meet (1).





3. Install the valve rocker arm cover.

4. Notice: Refer to Fastener Notice.

Important: Use an alternating criss-cross pattern when tightening the valve rocker cover bolts. Failure to do so may result in oil leakage from the valve cover due to improper seating of the gasket.

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





5. Connect the PCV foul air tube to the PCV valve.





6. Install the heater inlet and outer front pipe.
7. Install the spark plug wire harness clip to the heater inlet and outlet front pipe bracket.
8. Connect the left spark plug wires to the spark plugs.
9. Install the intake manifold cover.
10. Fill the cooling system, as necessary. Refer to Draining and Filling Cooling System.