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.

Caution: Refer to Fastener Caution in the Preface section.




6. Install the lower intake manifold bolts and 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) and tighten to 50 N·m (37 lb ft).