84. Intake Manifold Installation - Lower

Intake Manifold Installation - Lower





1. Clean the lower intake manifold sealing surface using GM P/N 12346139 (Canadian P/N 10953463) or equivalent prior to installing any seals or gaskets.
2. Install the lower intake manifold gaskets and seals.
3. With gaskets and seals in place, apply a small drop 8 - 10 mm (0.31 - 0.39 inch) of RTV sealer GM P/N 12378521 (Canadian P/N 88901148) or equivalent, to the 4 corners of the intake manifold to block joints (1).
4. Install the lower intake manifold.
5. Apply threadlocker 272 GM P/N 12345493 (Canadian P/N 10953488) or the equivalent to the bolt threads.





6. Notice: Refer to Fastener Notice in Service Precautions.

Install the lower intake manifold bolts.
Tighten the lower intake manifold bolts in sequence to 15 Nm (11 ft. lbs.).