Valve Rocker Arm Cover Replacement (Front)

Removal Procedure

Caution: Refer to Battery Disconnect Caution in Service Precautions.

1. Disconnect the negative battery cable.
2. Partially drain the cooling system. Refer to Cooling System Service and Repair.





3. Remove the rear ignition wire harness at the upper intake manifold and at the spark plugs.





4. Remove the heater bypass intake.
5. Disconnect the Positive Crankcase Ventilation (PCV) vacuum hose.





6. Remove the valve rocker cover bolts.
7. Remove the valve rocker cover.
Bump the end of the valve rocker cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.
8. Clean the sealing surface on the cylinder head and the valve rocker cover with degreaser.

Installation Procedure





1. Install a new gasket and new bolt grommets to the valve rocker cover. Ensure that the gasket is seated properly in the valve groove.
2. Apply sealant at the cylinder head to the lower intake manifold joint at the rear of the lower intake manifold (1).

Important: Apply sealant GM P/N 12345739 or the equivalent at the cylinder head to the lower intake manifold joint.

3. Apply sealant at the cylinder head to the lower intake manifold joint at the front of the lower intake manifold (1).
4. Apply sealer in the notch on the cover. Use GM P/N 1052917 or the equivalent.
5. Install the valve rocker cover.
6. Connect the PCV valve vacuum line.

Notice: Refer to Fastener Notice in Service Precautions.

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





8. Install the heater bypass tube.
9. Install the rear ignition wire harness.
10. Connect the negative battery cable.