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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 >> Installation Procedure

Installation 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. Lubricate and fill the valve lash adjusters with engine oil.
  2. Install the valve lash adjusters in their original locations.
    3. Fig 1: Installing Valve Lash Adjusters
    G01706262Courtesy of GENERAL MOTORS CORP.
  3. Lubricate the valve rocker arm roller.
  4. Install the valve rocker arms in their original locations.
    5. Fig 2: Installing Valve Rocker Arms
    G01706263Courtesy of GENERAL MOTORS CORP.
  5. Coat the camshaft journals with engine oil.
  6. Install the camshafts to their original position.
    7. Fig 3: Installing Camshafts
    G01706264Courtesy of GENERAL MOTORS CORP.
  7. Install the camshaft caps onto their original journal.
    NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten 

    Tighten the camshaft cap bolts to 12 N.m (106 lb in).

    8. Fig 4: Installing Camshaft Caps
    G01706265Courtesy of GENERAL MOTORS CORP.
  8. Carefully move the camshaft sprockets back onto the camshafts and remove the J 44222.
  9. Install the intake camshaft sprocket washer, and the bolt, and the exhaust camshaft actuator bolt.

    Tighten 

    • Tighten the intake camshaft sprocket bolt the first pass 30 N.m (22 lb ft).
    • Use the J 36660-A to tighten the intake camshaft sprocket bolt the final pass and additional 135 degrees.
      • Fig 5: Using J 36660-A To Tighten Intake Camshaft Sprocket Bolt
      G01706266Courtesy of GENERAL MOTORS CORP.
    • Tighten the exhaust camshaft actuator bolt the first pass to 25 N.m (18 lb ft).
    • Use the J 36660-A to tighten the exhaust camshaft actuator bolt a final pass an additional 135 degrees.
  10. Install the camshaft cover. Refer to Camshaft Cover Replacement .
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