Intake Manifold: Service and Repair

Intake Manifold Replacement

Removal Procedure





1. Remove the throttle body.
2. Remove the PCM.
3. Disconnect all harnesses from the engine harness bracket.
4. Remove the front differential vent hose from the bracket clip.





5. Remove the engine harness bracket bolt and remove the bracket.
6. Disconnect the MAP sensor electrical connector.





7. Disconnect the crankcase ventilation hose.
8. Disconnect the brake hose at the booster.
9. Remove the generator.





10. Loosen and remove the intake manifold bolts.
11. Remove the intake manifold.

Installation Procedure





1. Install a new intake manifold gasket.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the intake manifold onto the engine and secure the manifold with the bolts.
^ Tighten the intake manifold bolts to 10 Nm (89 inch lbs.).
3. Install the generator.
4. Install the brake hose to the booster.
5. Lubricate the inner diameter of the crankcase ventilation hose with GM P/N 12345884 (Canadian P/N 5728223) or equivalent.





6. Install the crankcase ventilation hose.
7. Install the MAP sensor electrical connector.





8. Install the engine harness bracket. Secure the bracket with the bolt.
^ Tighten the engine harness bracket bolt to 50 Nm (37 ft. lbs.).





9. Install the front differential vent hose to the engine harness bracket clip.
10. Install all harnesses to the original location onto the engine harness bracket.
11. Install the PCM.
12. Install the throttle body.