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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 418 (Engine Mechanical - 4.2L 6-Cylinder (On-Vehicle)) >> Repair Instructions >> Camshaft Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 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. Remove the intake and the exhaust camshaft sprocket bolts.
  3. Install the J 44222 onto the cylinder head and adjust the horizontal bolts into the camshaft sprockets in order to maintain chain tension and keep from disturbing the timing chain components.
    4. Fig 1: Installing J 44222 Onto Cylinder Head
    G01706329Courtesy of GENERAL MOTORS CORP.
  4. Carefully move the sprockets with the timing chain, off of the camshafts.
  5. Remove the camshaft cap bolts.
    IMPORTANT: Place the camshaft caps in a rack to ensure the caps are installed in the same location from which they were removed.
  6. Remove the camshaft caps and store.
    7. Fig 2: Removing Camshaft Caps
    G01706330Courtesy of GENERAL MOTORS CORP.
  7. Remove the camshafts.
    8. Fig 3: Removing Camshafts
    G01706331Courtesy of GENERAL MOTORS CORP.
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