Removal Procedure
- Drain the cooling system.
- Remove the left spark plug wires.
- Remove the right engine mount strut at the engine. Refer to Engine Mount Strut (Right) - Replacement .
- Remove the thermostat bypass hose and pipe.
- Remove the positive crankcase ventilation (PCV) valve from the left valve rocker arm cover.
- Remove the left valve rocker arm cover bolts.
- Remove the left valve rocker arm cover.
Courtesy of GENERAL MOTORS CORP.
- Remove the left valve rocker arm cover gasket.
- Clean the valve rocker arm cover.
- Clean the valve rocker arm cover gasket mating surfaces.