Century V6-3100 3.1L VIN M SFI (1998)
Valve Cover: Service and Repair
Left Side
REMOVAL PROCEDURE
1. Raise and suitably support the vehicle.
2. Drain the engine coolant.
3. Lower the vehicle.
4. Remove the left (front) spark plug wires.
5. Remove the Positive Crankcase Ventilation (PCV) valve from the left (front) valve rocker arm cover.
6. Remove the thermostat bypass hose and pipe.
7. Remove the left (front) valve rocker arm cover bolts.
8. Remove the left (front) valve rocker arm cover.
9. Remove the left (front) valve rocker arm cover gasket.
10. Clean the valve rocker arm cover.
11. Clean the valve rocker arm cover gasket sealing surfaces on the cylinder head and the lower intake manifold.
INSTALLATION PROCEDURE
1. Install a new left (front) valve rocker arm cover gasket.
2. Apply sealant at the cylinder head to lower intake manifold joint at the rear of the lower intake manifold (1).
Important: Apply sealant GM P/N 12345739 or equivalent at the cylinder head to lower intake manifold joint.
