Intake Manifold Installation

1. Install the new gaskets onto the cylinder heads.
2. Install the intake manifolds.
3. Install the intake manifold studs.
^ Tighten the intake manifold studs, (from the center out,) to 42 Nm (31 ft. lbs.).

IMPORTANT:
2.1. Apply teflon sealer GM P/N 1236004 on the threads of the studs that are second to the end on both intake manifolds. There are a total of four studs which require the teflon sealer.
2.2. Apply threadlocker GM P/N 12345493 on the threads of the remaining studs.

NOTICE: Refer to Fastener Notice in Service Precautions.

4. Install the miscellaneous brackets and fuel line brackets on the intake studs.
5. Install the nuts for the brackets.
^ Tighten the bracket nuts to 23 Nm (17 ft. lbs.).





6. Install the center intake manifold gaskets on the intake manifolds.
7. Install the O-ring onto the turbocharger inlet housing.
8. Lubricate the O-ring lightly with engine oil.
9. Install the center intake manifold onto the right and the left intake manifolds and on the turbocharger inlet housing.
10. Install the bolts to the center intake manifold.
^ Tighten the center intake manifold bolts to 23 Nm (17 ft. lbs.).