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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1443 (Engine Mechanical - 4.2L (Ll8)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Rocker Arm And Valve Lash Adjuster Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 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. Fig 1: View Of J 44222 Installed Onto Cylinder Head
    GM760724Courtesy of GENERAL MOTORS CORP.
  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. See Special Tools and Equipment .
  4. Carefully move the sprockets with the timing chain off of the camshafts.
    5. 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: Installing Camshaft Retainer Caps
    GM637767Courtesy of GENERAL MOTORS CORP.
  6. Remove the camshaft caps.
    7. Fig 3: Identifying Camshafts
    GM637768Courtesy of GENERAL MOTORS CORP.
  7. Remove the camshafts.
    8. Fig 4: View Of Valve Rocker Arms
    GM637609Courtesy 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 5: View Of Valve Lash Adjusters
    GM637608Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve lash adjusters.
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