Impala V6-3.5L VIN N (2006)
head or its components.
Install the valve rocker arms in their original positions.
Notice: Refer to Fastener Notice.
6. Install the valve rocker arm bolts.
Tighten the bolts to 34 Nm (25 ft. lbs.).
7. With the NEW gaskets and seals in place, apply a small drop, 8 - 10 mm (0.031 - 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 engine block joints (1).
8. Install the lower intake manifold.
9. Notice: Maximum gasket performance is achieved when using new fasteners, which contain a thread-locking patch. If the fasteners are not
replaced, a thread locking chemical must be applied to the fastener threads. Failure to replace the fasteners or apply a thread-locking chemical
MAY reduce gasket sealing capability.
Notice: Failure to tighten vertical bolts before the diagonal bolts may cause an oil leak.
Apply sealer GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the lower intake manifold bolt threads.
10. Install the lower intake manifold bolts.
