86. Lower Intake Manifold Installation

Lower Intake Manifold Installation (L26)




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 in) 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.





Notice: Refer to Fastener Notice in Service Precautions.

6. Install the lower intake manifold bolts.

Tighten the lower intake manifold bolts in sequence to 15 N.m (11 lb ft).




7. Install the generator brace bracket (571).
8. Install the generator brace bracket bolts (569, 570).

Tighten the generator brace bracket bolts to 50 N.m (37 lb ft).