For 1990-2009 cars only
- Install the lower intake manifold gaskets.
- Coat the ends of the push rods using prelube GM P/N 12345501 (Canadian P/N 992704) or the equivalent.
- Install the push rods in their original location.
- Coat the rocker arm friction surfaces using prelube GM P/N 12345501 (Canadian P/N 992704) or the equivalent.
- Install the valve rocker arms in their original positions.
- Install the valve rocker arm bolts and tighten to 32 N·m (24 lb ft).
Note: All gasket mating surfaces must be free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.
Note: RTV sealer is not to be placed under the lower intake manifold gaskets.
Note: The intake valve push rods measure 146.0 mm (5.75 in) and the exhaust valve push rods measure 152.5 mm (6.0 in) in length.
Note: Shims may be required under the valve rocker arm pedestals if reconditioning has been performed on the cylinder head or its components.
Caution: Refer to Fastener Caution in the Preface section.
