Sierra Classic 3500 4WD V8-8.1L (2007)
11. Install NEW intake manifold bolts.
12. Notice: Refer to Fastener Notice in Service Precautions.
Tighten the intake manifold bolts in the sequence shown, using 4 passes.
1. Tighten the bolts a first pass to 5 Nm (44 inch lbs.).
2. Tighten the bolts a second pass to 8 Nm (71 inch lbs.).
3. Tighten the bolts a third pass to 12 Nm (106 inch lbs.).
4. Tighten the bolts a final pass to 15 Nm (11 ft. lbs.).
13. Important: Lubricate the fuel injector O-ring seals with clean engine oil and install onto the spray tip of each injector.
If replacing the intake manifold, install the fuel rail.
14. Install the fuel rail studs.
Tighten the studs to 12 Nm (106 inch lbs.).
