Intake Manifold Replacement - Lower

Removal Procedure





1. Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure.
2. Drain the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
3. Remove the supercharger. Refer to Supercharger Replacement.
4. Remove the thermostat housing. Refer to Thermostat Replacement in Cooling System.
5. Remove the EGR tube at the intake manifold.
6. Remove the electrical connection at the temperature sensor.





7. Remove the lower intake manifold bolts.
8. Remove the lower intake manifold. The coolant bypass tube will release from the intake manifold as the manifold is removed.
9. Remove the intake manifold gaskets.

Installation Procedure





Important: Before installing the manifold, complete the following steps:
^ Use a suitable solvent in order to clean all oil from the cylinder block, the cylinder heads, and the intake manifold sealing surface.
^ Clean any adhesive compound from the intake manifold bolts and the bolt holes.
^ Apply a GM approved sealer to the ends of the intake manifold seals.
^ Apply a GM approved thread locking compound to the intake manifold bolts.

1. Install the intake manifold gaskets.





2. Align the coolant bypass tube with the opening in the manifold. Install the intake manifold.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the lower intake manifold bolts.
^ Tighten the lower intake manifold bolts in sequence to 15 Nm (11 ft. lbs.).
4. Install the electrical connector at the temperature sensor.





5. Install the EGR tube to the intake manifold.
6. Install the thermostat housing.
7. Install the supercharger. Refer to Supercharger Replacement.
8. Fill the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
9. Connect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure.