C 2500 Truck 2WD V8-305 5.0L VIN M SFI (1997)
Intake Manifold: Service and Repair
Intake Manifold Installation
1. Install the gaskets to the cylinder head with the port blocking plates facing the rear of the engine and This Side Up stamping facing up.
2. Install RTV to the front and the rear sealing surfaces on the block. Apply a 5 mm (0.067 in) bead of RTV GM P/N 12346192 or equivalent to the
front and the rear of the block. Extend the bead 13 mm (0.50 inch) up each cylinder head to seal and retain the gaskets.
3. Install the lower intake manifold to the engine. Apply sealer, GM P/N 12345382 or equivalent, to the lower intake manifold bolts.
Lower Intake Manifold Tightening Sequence
4. Install the lower intake manifold bolts. Tighten the bolts in three steps:
a. Tighten the bolts on the first sequence to 3 Nm (27 inch lbs.)..
b. Tighten the bolts on the second sequence to 12 Nm (106 inch lbs.).
c. Tighten the bolts on the final sequence to 15 Nm (11 ft. lbs.).
