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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 - Left >> 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 Left Cylinder Head Dowel Pins
    G01661144Courtesy 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: Left Cylinder Head Gasket
    G01661145Courtesy 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: Left Cylinder Head
    G01661146Courtesy of GENERAL MOTORS CORP.
  6. Apply sealant GM P/N 12346004 or equivalent to the threads of the cylinder head bolts.
  7. Install the cylinder head bolts finger tight.
    Fig 4: Left Cylinder Head Bolts
    G01661147Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE .
  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.

    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. Install the spark plugs.
    Fig 5: Left Cylinder Head Bolt Tightening Sequence
    G01661148Courtesy of GENERAL MOTORS CORP.
  11. If reusing the engine coolant temperature gauge sensor (if applicable), apply sealant GM P/N 12346004 or equivalent to the threads of the engine coolant temperature gauge sensor.
  12. Install the engine coolant temperature gauge sensor (if applicable).

    Tighten 

    Tighten the engine coolant temperature gauge sensor to 20 N.m (15 lb ft).

    Fig 6: Engine Coolant Temperature Gauge Sensor
    G01661149Courtesy of GENERAL MOTORS CORP.
  13. If reusing the engine coolant temperature sensor (if applicable), apply sealant GM P/N 12346004 or equivalent to the threads of the engine coolant temperature gauge sensor.
  14. Install the engine coolant temperature sensor (if applicable).

    Tighten 

    Tighten the engine coolant temperature sensor to 20 N.m (15 lb ft).

    Fig 7: Engine Coolant Temperature Sensor
    G01661150Courtesy of GENERAL MOTORS CORP.
  15. Install the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  16. Install the lower intake manifold. Refer to Intake Manifold Replacement - Lower .
  17. Install the exhaust manifold. Refer to EXHAUST MANIFOLD REPLACEMENT - LEFT .
  18. Install the spark plug wire harness and spark plug wire support.

    Tighten 

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

    Fig 8: Spark Plug Wire Harness & Wire Support
    G01661151Courtesy of GENERAL MOTORS CORP.
  19. Install the bolt for and the fuel pipe bracket to the rear of the cylinder head.

    Tighten 

    Tighten the fuel pipe bracket bolt to 30 N.m (22 lb ft).

  20. Install the ground wire and the ground wire bolt to the rear of the cylinder head.

    Tighten 

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

    Fig 9: Ground Wire, Ground Wire Bolt & Fuel Pipe Bracket Bolt
    G01661152Courtesy of GENERAL MOTORS CORP.
  21. Install the stud for the power steering pump mounting bracket to the cylinder head.

    Tighten 

    Tighten the power steering pump mounting bracket stud to 20 N.m (15 lb ft).

    Fig 10: Power Steering Pump Mounting Bracket Stud
    G01661153Courtesy of GENERAL MOTORS CORP.
  22. Slide the power steering pump mounting bracket with the power steering pump and the A/C compressor on the stud.
  23. Position the power steering pump rear bracket on the studs.
  24. Install the power steering pump mounting bracket three bolts and the nut.
  25. Install the nut for the power steering pump rear bracket to the front of the engine.

    Tighten 

    Tighten the power steering pump mounting bracket and the power steering pump rear bracket bolts and the nuts to 41 N.m (30 lb ft).

  26. Install the drive belt. Refer to Drive Belt Replacement .
  27. Install the engine cooling fan assembly. Refer to FAN CLUTCH REPLACEMENT .
    Fig 11: Power Steering Pump Brackets, Power Steering Pump & A/C Compressor
    G01661154Courtesy of GENERAL MOTORS CORP.
  28. Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
  29. Connect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
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