62. Intake Manifold Cleaning and Inspection - Upper

Intake Manifold Cleaning and Inspection - Upper





1. Remove the throttle body bolts.
2. Remove the throttle body.
3. Remove the throttle body studs, if required.
4. Remove the manifold absolute pressure (MAP) sensor bolt and clip.
5. Remove the MAP sensor.
6. Remove the evaporative emissions (EVAP) purge valve bolt.
7. Remove the EVAP purge valve.

8. Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

Clean the intake manifold with solvent.
9. Dry the intake manifold with compressed air.
10. Inspect all gasket mating surfaces for nicks or cracks and replace if necessary.
11. Inspect the EVAP purge valve seal for damage and replace if necessary.
12. Install the EVAP purge valve.

13. Notice: Refer to Fastener Notice in Service Precautions.

Install the EVAP purge valve bolt.
Tighten the EVAP purge valve bolt to 16 Nm (12 ft. lbs.).
14. Inspect the MAP sensor seal for damage and replace if necessary.
15. Install the MAP sensor.
16. Install the MAP sensor clip and bolt.
Tighten the MAP sensor bolt to 10 Nm (89 inch lbs.).
17. Install the throttle body studs, if required.
Tighten the throttle body studs to 6 Nm (53 inch lbs.).
18. Inspect the throttle body seal for damage and replace if necessary.
19. Install the throttle body.
20. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) to the throttle body bolt threads.
21. Install the throttle body bolts.
Tighten the throttle body bolts to 10 Nm (89 inch lbs.).