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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.3L (On-Vehicle) >> Repair Instructions >> Cylinder Head Replacement - Right >> Installation Procedure

Installation Procedure

  1. Clean the cylinder head gasket surfaces on the engine block.
  2. Inspect the dowel pins (cylinder head locator) for proper installation
  3. Clean the cylinder head gasket surfaces on the cylinder head.
    Fig 1: Proper Installation Of Right Cylinder Head Dowel Pins
    G01661164Courtesy of GENERAL MOTORS CORP.

    Important:  Do not use any type sealer on the cylinder head gasket (unless specified).

  4. Install the NEW cylinder head gasket in position over the dowel pins (cylinder head locator).
    Fig 2: Right Cylinder Head Gasket
    G01661165Courtesy of GENERAL MOTORS CORP.
  5. Install the cylinder head onto the engine block. Guide the cylinder head carefully into place over the dowel pins and the cylinder head gasket.
    Fig 3: Right Cylinder Head
    G01661166Courtesy of GENERAL MOTORS CORP.
  6. Apply sealant GM P/N 12346004 or equivalent to the threads of the cylinder head bolts.
    NOTE: Refer to FASTENER NOTICE .
  7. Install the cylinder head bolts finger tight.
    Fig 4: Right Cylinder Head Bolts
    G01661167Courtesy of GENERAL MOTORS CORP.
  8. Tighten the cylinder head bolts in sequence on the first pass.

    Tighten 

    Tighten the bolts in sequence on the first pass to 30 N.m (22 lb ft).

  9. Use the J 36660-A in order to tighten the cylinder head bolts in sequence on the final pass.

    Tighten 

    • Rotate the long bolts (1, 4, 5, 8, and 9) an additional 75 degrees.
    • Rotate the medium bolts (12 and 13) an additional 65 degrees.
    • Rotate the short bolts (2, 3, 6, 7, 10, and 11) an additional 55 degrees.
    10. Fig 5: Right Cylinder Head Bolts Tightening Sequence
    G01661168Courtesy of GENERAL MOTORS CORP.
  10. Install the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  11. Install the lower intake manifold. Refer to Intake Manifold Replacement - Lower .
  12. Install the spark plug wire harness and the spark plug wire support and bolts.

    Tighten 

    Tighten only the rear spark plug wire support bolt to 12 N.m (106 lb in).

  13. Remove the front spark plug wire support bolt. The front spark plug wire support bolt is used to fasten the oil level indicator tube, and will be installed within the oil level indicator tube installation procedure.
  14. Install the spark plugs.
  15. Install the oil level indicator tube and indicator. Refer to Oil Level Indicator and Tube Replacement .
  16. Install the exhaust manifold. Refer to EXHAUST MANIFOLD REPLACEMENT - RIGHT .
    Fig 6: Spark Plug Wire Harness & Wire Support
    G01661169Courtesy of GENERAL MOTORS CORP.
  17. Install the bolt and the ground wires to the rear of the cylinder head.

    Tighten 

    Tighten the ground wire bolt to 35 N.m (26 lb ft).

    Fig 7: Ground Wire & Bolt At Rear Of Cylinder Head
    G01661170Courtesy of GENERAL MOTORS CORP.
  18. Install the bolt and the ground strap to the rear of the cylinder head.

    Tighten 

    Tighten the ground strap bolt to 35 N.m (26 lb ft).

    Fig 8: Ground Strap & Bolt At Rear Of Cylinder Head
    G01661171Courtesy of GENERAL MOTORS CORP.
  19. Install the stud for the generator mounting bracket.

    Tighten 

    Tighten the generator mounting bracket stud to 20 N.m (15 lb ft).

    20. Fig 9: Generator Mounting Bracket Stud
    G01661172Courtesy of GENERAL MOTORS CORP.
  20. Install the generator mounting bracket.
  21. Install the engine cooling fan assembly. Refer to FAN CLUTCH REPLACEMENT .
  22. Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
  23. Connect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
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