Envoy, Rainer, Trailblazer 2006-2007

Camshaft (Cylinder Head) Cover

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Removal & Installation



4.2L Engines
  1. Remove the intake manifold, as outlined in this section.
  2.  
  3. Remove the A/C line at the oil level indicator tube bracket nut.
  4.  
  5. Remove the A/C bracket bolt from the engine lift hook.
  6.  
  7. Position the A/C line out of the way.
  8.  
  9. Remove the engine lift bracket.
  10.  
  11. Disconnect the ignition control module electrical connectors.
  12.  
  13. Loosen the ignition control module bolts.
  14.  
  15. Remove the ignition control module.
  16.  
  17. Disconnect the engine electrical harness housing from the camshaft cover (1) taking care not to damage the clips that hold the housing in place.
  18.  
  19. Disconnect the fuel injection harness electrical connector.
  20.  
  21. Loosen and remove the camshaft cover bolts.
  22.  
  23. Remove the camshaft cover.
  24.  
  25. Clean and inspect the camshaft cover.
  26.  

To install:

  1. Install a new camshaft cover seal.
  2.  
  3. Install new rubber ignition control module seals.
  4.  
  5. Install the camshaft cover and secure with the cam cover bolts. Tighten the bolts to 89 inch lbs. (10 Nm).
  6.  
  7. Install the ignition control modules and secure the modules with bolts. Tighten to 89 inch lbs. (10 Nm).
  8.  
  9. Connect the ignition control module electrical connectors.
  10.  
  11. Install the fuel injector electrical connectors.
  12.  
  13. Install the engine electrical harness housing.
  14.  
  15. Install the A/C line bracket to the oil level indicator tube stud and secure the bracket with the nut. Tighten the A/C line bracket nut to 62 inch lbs. (7 Nm).
  16.  
  17. Install the engine lift bracket and secure the lift hook with the bolts. Tighten the lift bracket bolts to 37 ft. lbs. (50 Nm).
  18.  
  19. Install the A/C line bracket to the engine lift bracket and secure the A/C bracket with the bolt. Tighten the A/C bracket bolt to 89 inch lbs. (10 Nm).
  20.  
  21. Install the intake manifold.
  22.  

 
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