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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 >> Valve Rocker Arm and Valve Lash Adjuster 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 exhaust and the intake 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
    G01706257Courtesy of GENERAL MOTORS CORP.
  4. Carefully move the sprockets with the timing chain off of the camshafts.
    IMPORTANT: Place the camshaft caps in a rack to ensure the caps are installed in the same location from which they were removed.
  5. Remove the camshaft cap bolts.
    6. Fig 2: Removing Camshaft Cap Bolts
    G01706258Courtesy of GENERAL MOTORS CORP.
  6. Remove the camshaft caps.
  7. Remove the camshafts.
    Fig 3: Removing Camshafts
    G01706259Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Once removed, place the valve rocker arms and valve lash adjusters in an organized order so the components can be installed into the original locations.
  8. Remove the valve rocker arms.
    9. Fig 4: Removing Valve Rocker Arms
    G01706260Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve lash adjusters.
    10. Fig 5: Removing Valve Lash Adjusters
    G01706261Courtesy of GENERAL MOTORS CORP.
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