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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 >> 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. Coat the camshaft journals, camshaft journal thrust face, and camshaft lobes with clean engine oil.
  2. Install the intake and exhaust camshafts to their original positions.
    3. Fig 1: Installing Intake & Exhaust Camshafts
    G01706332Courtesy of GENERAL MOTORS CORP.
  3. Install the J 44221 with the camshaft flats up and the number 1 cylinder at top dead center.
    IMPORTANT: Install the camshaft caps onto their original locations. The camshaft caps are pin stamped for direction and numerical order.
  4. Install the camshaft caps and bolts.
    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).

    5. Fig 2: Installing Camshaft Caps And Bolts
    G01706333Courtesy of GENERAL MOTORS CORP.
  5. Remove the J 44221
  6. Carefully move the sprockets back onto the camshafts and remove the J 44222.
    7. Fig 3: Removing J 44222
    G01706334Courtesy of GENERAL MOTORS CORP.
  7. Install the intake camshaft sprocket washer and bolt, and the exhaust camshaft actuator bolt.

    Tighten 

    • Tighten the intake camshaft sprocket bolt the first pass to 30 N.m (22 lb ft).
    • Use the J 36660-A to tighten the intake camshaft sprocket bolt the final pass an additional 135 degrees.
    • 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.
  8. Install the camshaft cover. Refer to Camshaft Cover Replacement .
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