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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Exhaust Camshaft Position Actuator Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the camshaft cover. Refer to CAMSHAFT COVER REPLACEMENT   .
  2. Rotate the engine until the word Delphi on the exhaust camshaft position actuator is lined up parallel with the cylinder head to cam cover mating surface.
  3. Remove the top chain guide bolts.
  4. Remove the top chain guide.
  5. Using the timing mark on the exhaust camshaft position actuator sprocket as a reference, make a mark on the timing chain link across from it.
    Fig 1: Removing Top Chain Guide Bolts And Top Chain Guide
    G02128548Courtesy of GENERAL MOTORS CORP.
  6. Install the J-44217  .
    1. 6.1. Install the hook portion of the timing chain retention tools into one of the timing chain links near the timing chain shoe on both sides of the engine.
    2. 6.2. Tighten the wingnuts.
    3. 6.3. Ensure the hooks are still in one of the links and the gage blocks of the tool are firmly in place on the edge of the head.
      Fig 2: Installing Hook Portion Of Timing Chain Retention Tools
      G02128549Courtesy of GENERAL MOTORS CORP.
  7. Remove the exhaust camshaft position actuator bolt.
  8. Remove the exhaust camshaft position actuator.
    Fig 3: Removing Exhaust Camshaft Position Actuator
    G02128550Courtesy of GENERAL MOTORS CORP.
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