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Upper Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Upper Intake Manifold
    GM1866469Courtesy of GENERAL MOTORS CORP.
  1. Remove the throttle body bolts and nuts.
  2. Remove the throttle body.
  3. Remove the throttle body studs, if required.
  4. Remove the manifold absolute pressure (MAP) sensor (3).
  5. Remove the evaporative emissions (EVAP) purge valve bolt (1).
  6. Remove the EVAP purge valve (2).
    7. Fig 2: Identifying EVAP Purge Valve Isolator
    GM1665698Courtesy of GENERAL MOTORS CORP.
  7. Remove the EVAP purge valve isolator, if equipped.
    8. WARNING: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.
  8. 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 isolator, if equipped.
    13. Fig 3: Identifying Correct EVAP Purge Valve Isolator Installation
    GM1665700Courtesy of GENERAL MOTORS CORP.
    NOTE: Ensure that the EVAP purge valve isolator is installed properly as shown, with the isolator covering the top and bottom of the purge valve bolt hole flange. Failure to do so may cause improper EVAP purge valve operation.
  13. Install the EVAP purge valve.
    14. Fig 4: View Of Upper Intake Manifold
    GM1866469Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  14. Install the EVAP purge valve bolt (1) and tighten to 16 N.m (12 lb ft).
  15. Inspect the MAP sensor seal for damage and replace if necessary.
  16. Install the MAP sensor (3).
  17. Install the throttle body studs, if required. Tighten the throttle body studs to 6 N.m (53 lb in).
  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 and nut threads.
  21. Install the throttle body bolts and nuts and tighten to 10 N.m (89 lb in).
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