Intake Manifold Replacement - Lower

Removal Procedure





1. Remove the upper intake manifold. Refer to Intake Manifold Replacement (Upper).
2. Remove the coolant temperature sensor.





3. Remove the O-ring seals (3, 4), if necessary.
4. Remove the lower intake manifold bolts (1).
5. Remove the lower intake manifold (2).





6. Remove the lower intake manifold seals (1).
7. Remove the lower intake manifold gaskets (2).

Installation Procedure





1. Install the lower intake manifold gaskets (2).
2. Install the lower intake manifold seals (1). Apply silicone sealer GM P/N 12345366 or equivalent to the ends for the manifold seals (2).





3. Install the lower intake manifold (2).
4. Apply thread lock compound GM P/N 12345493 or equivalent to the bolt threads before installing.

Notice: Refer to Fastener Notice in Service Precautions.

5. Install the lower intake manifold bolts (1).
^ Tighten the lower manifold bolts (1) to 15 Nm (11 ft. lbs.).





6. Remove the coolant temperature sensor.
^ Tighten the coolant temperature sensor to 25 Nm (18 ft. lbs.).
7. Remove the upper intake manifold. Refer to Intake Manifold Replacement (Upper).