For 1990-2009 cars only
- Install NEW valve rocker arm cover grommets and use NEW valve rocker arm cover bolts if they are serviced with the grommet.
- Install the valve rocker arm cover gasket into the valve rocker arm cover.
- Apply sealer GM P/N 12378521 (Canadian P/N 88901148) or equivalent to the surfaces where the cylinder head and intake manifold meet (1).
- Install the valve rocker arm cover.
- Install the valve rocker arm cover bolts, if necessary.
- Install two NEW positive crankcase ventilation (PCV) tube O-rings.
- Install the fresh air tube.
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 surfaces.
Notice: Refer to Fastener Notice in the Preface section.
Tighten
Tighten the valve rocker arm cover bolts to 10 N·m (89 lb in).
- Install NEW valve rocker arm cover grommets and use NEW valve rocker arm cover bolts if they are serviced with the grommet.
- Install the valve rocker arm cover gasket into the valve rocker arm cover.
- Apply sealer GM P/N 12378521 (Canadian P/N 88901148) or equivalent to the surfaces where the cylinder head and intake manifold meet (1).
- Install the valve rocker arm cover.
- Install the valve rocker arm cover bolts, if necessary, and tighten to 10 N·m (89 lb in)
- Install two NEW positive crankcase ventilation (PCV) tube O-rings.
- Install the fresh air tube.
Note: 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 surfaces.
Caution: Refer to Fastener Caution in the Preface section.
