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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1219 (Engine Mechanical - 4.2L 6-Cylinder (Unit Repair)) >> Repair Instructions >> Cylinder Head Assemble

Cylinder Head Assemble

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.

Tools Required

  1. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480 or equivalent to the threads.
  2. Install the (end) oil gallery plugs.
    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 oil gallery plugs to 38 N.m (28 lb ft).

    3. Fig 1: Installing (End) Oil Gallery Plugs
    G01706561Courtesy of GENERAL MOTORS CORP.
  3. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480 or equivalent to the plugs.
  4. Install the (inner) oil gallery plugs.
    5. Fig 2: Installing (Inner) Oil Gallery Plugs
    G01706562Courtesy of GENERAL MOTORS CORP.
  5. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480 or equivalent to the plug.
  6. Install the water jacket plug.
    7. Fig 3: Installing Water Jacket Plug
    G01706563Courtesy of GENERAL MOTORS CORP.
  7. Use J 38820 to install the valve seals. There is only one size valve seal.
    Fig 4: Installing Valve Seals
    G01706564Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Lubricate the valve stems with clean engine oil before installing.
  8. Install the valves. 0.075 mm (0.003 in) oversized valves are available if the valve guides needed to be reamed. Use the same (original size) valve seal.
    9. Fig 5: Installing Valves
    G01706565Courtesy of GENERAL MOTORS CORP.
  9. Install the valve spring and the valve spring retainer.
    10. Fig 6: Installing Valve Spring And Valve Spring Retainer
    G01706566Courtesy of GENERAL MOTORS CORP.
  10. Use J 8062 and J 42037 to compress the valve spring.
    11. Fig 7: Compressing Valve Spring
    G01706567Courtesy of GENERAL MOTORS CORP.
  11. Install the valve keys.
    12. Fig 8: Installing Valve Keys
    G01706568Courtesy of GENERAL MOTORS CORP.
  12. Remove J 8062 and J 42037.
    IMPORTANT: Do not try to centralize the electrode on the spark plug. The electrode is offset by design.
  13. Install the spark plugs.
    14. Fig 9: Installing Spark Plugs
    G01706569Courtesy of GENERAL MOTORS CORP.
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