For 1990-2009 cars only
- Lightly coat new seals, including the O-rings, with engine oil prior to installation to assist in holding the O-ring seals to the valve cover.
- Install the valve cover seals.
- Apply a thin coat of silicone sealer GM P/N 12345997 at the front and at the back of the seals.
- Install the valve cover to the cylinder head.
- Install the valve cover bolts.
Tighten
Tighten the valve cover bolts to 8 N·m (71 lb in).
