GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 36660-A Torque Angle Meter

Removal Procedure


    Object Number: 782670  Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the drive belt. Refer to Drive Belt Replacement .
  3. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  4. Remove the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side .
  5. Remove the left side pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  6. Remove the junction block bracket bolt.
  7. Position the bracket and wiring harness aside.

  8. Object Number: 340090  Size: SH
  9. Position the power steering (P/S) pump bracket off of the stud and set aside.

  10. Object Number: 475833  Size: SH
  11. Remove the P/S pump bracket stud.

  12. Object Number: 782680  Size: SH
  13. Remove the harness ground bolt.
  14. Position the harness ground (4) and ground strap (5).

  15. Object Number: 387769  Size: SH
  16. Remove the engine coolant temperature (ECT) sensor.

  17. Object Number: 328582  Size: SH
  18. Remove the spark plugs.

  19. Object Number: 328588  Size: SH
  20. Remove the spark plug wire support bolts and support.

  21. Object Number: 480533  Size: SH
  22. Remove and discard the cylinder head bolts.

  23. Object Number: 480536  Size: SH
  24. Remove the cylinder head.

  25. Object Number: 334299  Size: SH
  26. Remove and discard the cylinder head gasket.

  27. Object Number: 330548  Size: SH
  28. Remove the cylinder head locator pins, if necessary.
  29. Clean and inspect the cylinder head, if necessary. Refer to Cylinder Head Cleaning and Inspection for the 4.3L engine - Unit Repair.
  30. Disassemble the cylinder head, if necessary. Refer to Cylinder Head Disassemble for the 4.3L engine - Unit Repair.

Installation Procedure


    Object Number: 334303  Size: SH
  1. Assemble the cylinder head, if necessary. Refer to Cylinder Head Assemble for the 4.3L engine - Unit Repair.
  2. Install the cylinder head locator pins, if necessary.

  3. Object Number: 334299  Size: SH

    Important: Do not use any type of sealer on the cylinder head gasket.

  4. Install a NEW cylinder head gasket.

  5. Object Number: 480536  Size: SH
  6. Install the cylinder head.

  7. Object Number: 480533  Size: SH
  8. Apply sealant GM U.S. P/N 12346004 (Canadian P/N 109534480), or equivalent to the threads of the NEW cylinder head bolts.
  9. Install the cylinder head bolts finger tight.
  10. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 5132  Size: SH
  11. Tighten the cylinder head bolts using the sequence shown.
  12. Tighten

    1. Tighten the cylinder head bolts a first pass to 30 N·m (22 lb ft).
    2. Tighten the long cylinder head bolts (1, 4, 5, 8, 9) a final pass to 75 degrees using J 36660-A .
    3. Tighten the medium cylinder head bolts (12, 13) a final pass to 65 degrees using J 36660-A .
    4. Tighten the short cylinder head bolts (2, 3, 6, 7, 10, 11) a final pass to 55 degrees using J 36660-A .

    Object Number: 328588  Size: SH
  13. Install the spark plug wire support and bolts.
  14. Tighten
    Tighten the spark plug wire support bolts to 12 N·m (106 lb in).


    Object Number: 328582  Size: SH
  15. Install the spark plugs.
  16. If installing NEW spark plugs measure for the correct gap. Adjust the spark plug gap if necessary.
  17. Specification
    Spark plug gap to 1.52 mm (0.060 in).

    Tighten

        • Tighten the spark plugs for a USED cylinder head to 15 N·m (11 lb ft).
        • Tighten the spark plugs on the initial installation of a NEW cylinder head to 30 N·m (22 lb ft).

    Object Number: 387769  Size: SH
  18. Install the ECT sensor. If reusing the old sensor, apply sealant GM P/N 12346004 (Canadian P/N 109534480), or equivalent to the threads.
  19. Tighten
    Tighten the ECT sensor to 20 N·m (15 lb ft).


    Object Number: 782680  Size: SH
  20. Position the ground strap (5) and harness ground (4).
  21. Install the harness ground bolt.
  22. Tighten
    Tighten the harness ground bolt to 16 N·m (12 lb ft).


    Object Number: 475833  Size: SH
  23. Install the P/S pump bracket stud.
  24. Tighten
    Tighten the P/S pump bracket stud to 20 N·m (15 lb ft).


    Object Number: 340090  Size: SH
  25. Position the P/S pump bracket onto the stud.

  26. Object Number: 782670  Size: SH
  27. Position the bracket and wiring harness.
  28. Install the junction block bracket bolt.
  29. Tighten
    Tighten the junction block bracket bolt to 25 N·m (18 lb ft).

  30. Install the left side pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  31. Install the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side .
  32. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  33. Install the drive belt. Refer to Drive Belt Replacement .
  34. Fill the cooling system. Refer to Cooling System Draining and Filling .