C 2500 Truck 2WD V8-8.1L VIN G (2002)
Intake Manifold Tightening Sequence
10. Apply threadlock, GM U.S. P/N 12345382, Canada P/N 10953489, or equivalent to a minimum of eight threads of the intake manifold bolts.
11. Install the intake manifold bolts.
Notice: Refer to Fastener Notice in Service Precautions.
12. Tighten the intake manifold bolts in sequence shown, using four passes.
12.1.
Tighten the intake manifold bolts to 5 Nm (44 inch lbs.) on the first pass.
12.2.
Tighten the intake manifold bolts to 5 Nm (44 inch lbs.) on the second pass.
Inspect the intake manifold joints for signs of intake manifold shifting. Correct as required.
12.3.
Tighten the intake manifold bolts to 10 Nm (89 inch lbs.) on the third pass.
12.4.
Tighten the intake manifold bolts to 12 Nm (106 inch lbs.) on the final pass.
Important: Lubricate the fuel injector O-ring seals with clean engine oil and install onto the spray tip of each injector.
13. If replacing the intake manifold, install the fuel rail.
14. Install the fuel rail studs.
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Tighten the fuel rail studs to 12 Nm (106 inch lbs.).
