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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 >> Off-Vehicle Repair Instructions >> Cylinder Head Assemble

Cylinder Head Assemble

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Tools Required

    Fig 1: View Of End Oil Gallery Plugs
    GM637600Courtesy of GENERAL MOTORS CORP.
  1. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the (end) oil gallery plugs.

    Tighten:  Tighten the oil gallery plugs to 38 N.m (28 lb ft).

    3. Fig 2: View Of Inner Oil Gallery Plug
    GM637599Courtesy of GENERAL MOTORS CORP.
  3. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plugs.
  4. Install the (inner) oil gallery plugs.
    5. Fig 3: View Of Water Jacket Plug
    GM637598Courtesy of GENERAL MOTORS CORP.
  5. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plug.
  6. Install the water jacket plug.
    7. Fig 4: View Of J 38820 & Valve Seals
    GM637703Courtesy of GENERAL MOTORS CORP.
  7. Use J 38820  to install the valve seals. See Special Tools and Equipment . There is only one size valve seal.
    8. Fig 5: View Of Valves
    GM637701Courtesy 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 6: View Of Valve Springs & Retainer
    GM637700Courtesy of GENERAL MOTORS CORP.
  9. Install the valve spring and the valve spring retainer.
    10. Fig 7: Installing J 8062 & J 42037 To Compress Valve Spring
    GM637698Courtesy of GENERAL MOTORS CORP.
  10. Use J 8062  and J 42037  to compress the valve spring. See Special Tools and Equipment .
    11. Fig 8: View Of Valve Keys
    GM659577Courtesy of GENERAL MOTORS CORP.
  11. Install the valve keys.
  12. Remove J 8062  and J 42037  . See Special Tools and Equipment .
    13. Fig 9: Measuring Valve Spring Installed Height
    GM64315Courtesy of GENERAL MOTORS CORP.
  13. Measure the valve installed height using a ruler. Measure from the base of the valve spring to the top of the valve. Refer to Engine Mechanical Specifications  .
  14. Install the remaining valves, springs, and other components.
    15. Fig 10: View Of Spark Plugs
    GM637610Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not try to centralize the electrode on the spark plug. The electrode is offset by design.
  15. Install the spark plugs.
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