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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 >> Valve Rocker Arm and Valve Lash Adjuster 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. 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.
    Fig 1: Removing Exhaust And Intake Sprocket Bolts
    G02128499Courtesy 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. Remove the camshaft caps.
    Fig 2: Removing Camshaft Caps
    G02128500Courtesy of GENERAL MOTORS CORP.
  7. Remove the camshafts.
    Fig 3: Removing Camshafts
    G02128501Courtesy 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.
    Fig 4: Removing Valve Rocker Arms
    G02128502Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve lash adjusters.
    Fig 5: Removing Valve Lash Adjusters
    G02128503Courtesy of GENERAL MOTORS CORP.
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