GM Service Manual Online
For 1990-2009 cars only

Cylinder Head Replacement Left Side

Removal Procedure


    Object Number: 173171  Size: SH

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the battery negative cable. Refer to Battery Replacement .
  2. Remove the engine cover. Refer to Engine Cover Replacement .
  3. Remove the engine cooling fan. Refer to Fan Replacement .
  4. Remove the drive belt. Refer to Drive Belt Replacement
  5. Remove the air conditioning compressor, if equipped. Refer to Air Conditioning Compressor Replacement .
  6. Remove the oil filler tube bolt.
  7. Remove the oil filler tube from the valve rocker arm cover.
  8. Remove the power steering pump pulley. Refer to Power Steering Pump Replacement .

  9. Object Number: 288829  Size: SH
  10. Remove the three bolts holding the power steering pump to the power steering pump mounting bracket.

  11. Object Number: 188295  Size: SH
  12. Slide the power steering pump mounting bracket off of the stud and the power steering pump.
  13. Remove the power steering pump mounting bracket stud from the cylinder head.
  14. Remove the intake manifold. Refer to Intake Manifold Replacement .
  15. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement .

  16. Object Number: 363401  Size: SH
  17. Remove the ground wires at the rear of the left cylinder head.
  18. Remove the A/C pipe bracket nut, if equipped.
  19. Remove the fuel pipe bracket bolt at the rear of the cylinder head.
  20. Remove the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .

  21. Object Number: 5130  Size: SH
  22. Remove and discard the cylinder head bolts.
  23. Remove the cylinder head.
  24. Clean all sealing surfaces. Refer to Cylinder Head Cleaning and Inspection .

Installation Procedure


    Object Number: 5129  Size: SH
  1. Install the cylinder head. Refer to Cylinder Head Installation .
  2. Install the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 363401  Size: SH
  4. Install the ground wires and bolt at the rear of the left cylinder head.
  5. Tighten
    Tighten the ground wire bolt to 35 N·m (26 lb ft).

  6. Install the fuel pipe bracket and bolt at the rear of the cylinder head.
  7. Tighten
    Tighten the fuel pipe bracket bolt to 30 N·m (22 lb ft).

  8. Install the A/C pipe bracket and nut, if equipped.
  9. Tighten
    Tighten the A/C pipe bracket nut to 35 N·m (26 lb ft).

  10. Install the exhaust manifold. Refer to Exhaust Manifold Replacement .
  11. Install the intake manifold. Refer to Intake Manifold Replacement .

  12. Object Number: 188295  Size: SH
  13. Install the stud for the power steering pump mounting bracket to the cylinder head.
  14. Tighten
    Tighten the power steering pump mounting bracket stud to 20 N·m (15 lb ft).

  15. Slide the power steering pump mounting bracket on the stud and the power steering pump.
  16. Install the power steering pump mounting bracket three bolts and the nut.
  17. Tighten
    Tighten the power steering pump mounting bracket bolts and nut to 41 N·m (30 lb ft).


    Object Number: 288829  Size: SH
  18. Install the power steering pump mounting bracket to the power steering pump.
  19. Tighten
    Tighten the power steering pump bolts to 50 N·m (37 lb ft).

  20. Install the power steering pump pulley. Refer to Power Steering Pump Replacement .

  21. Object Number: 173171  Size: SH
  22. Install the oil filler tube in the valve rocker arm cover.
  23. Install the oil filler tube bolt.
  24. Tighten
    Tighten the oil filler tube bolt to 25 N·m (18 lb ft).

  25. Install the air conditioning compressor. Refer to Air Conditioning Compressor Replacement .
  26. Install the drive belt. Refer to Drive Belt Replacement .
  27. Install the engine cooling fan. Refer to Fan Replacement .
  28. Connect the battery negative cable. Refer to Battery Replacement .
  29. Install the engine cover. Refer to Engine Cover Replacement .

Cylinder Head Replacement Right Side

Removal Procedure

  1. Disconnect the battery negative cable. Refer to Battery Replacement .
  2. Remove the engine cover. Refer to Engine Cover Replacement .
  3. Remove the drive belt. Refer to Drive Belt Replacement .
  4. Remove the engine cooling fan. Refer to Fan Replacement .
  5. Remove the intake manifold. Refer to Intake Manifold Replacement .

  6. Object Number: 317450  Size: SH
  7. Remove the spark plug wire harness support.
  8. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement .

  9. Object Number: 340790  Size: SH
  10. Remove the generator. Refer to Generator Replacement .
  11. Remove the engine wiring harness bracket from the generator mounting bracket.

  12. Object Number: 196643  Size: SH
  13. Remove the two bolts and nut holding the generator mounting bracket to the engine.
  14. Remove the generator mounting bracket.
  15. Remove the generator mounting bracket stud from the cylinder head.
  16. Remove the engine wiring harness bolt from the rear of the right cylinder head.
  17. Remove the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .

  18. Object Number: 334309  Size: SH
  19. Remove and discard the cylinder head bolts.
  20. Remove the cylinder head.
  21. Clean all sealing surfaces. Refer to Cylinder Head Cleaning and Inspection .

Installation Procedure


    Object Number: 196132  Size: SH
  1. Install the cylinder head. Refer to Cylinder Head Installation .
  2. Install the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  3. Install the exhaust manifold. Refer to Exhaust Manifold Replacement .
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 317450  Size: SH
  5. Install the spark plug wire harness and support.
  6. Tighten
    Tighten the spark plug wire support bolts to 12 N·m (106 lb in).

  7. Install the intake manifold. Refer to Intake Manifold Replacement .
  8. Install the bolt holding the engine wiring harness to the rear of the right cylinder head.
  9. Tighten
    Tighten the engine wiring harness bolt to 36 N·m (27 lb ft).


    Object Number: 196643  Size: SH
  10. Install the stud for the generator mounting bracket.
  11. Tighten
    Tighten the generator mounting bracket stud to 20 N·m (15 lb ft).

  12. Slide the generator mounting bracket on the stud.
  13. Instal the generator mounting bracket two bolts and the nut.
  14. Tighten
    Tighten the generator mounting bracket bolts and the nut to 41 N·m (30 lb ft).


    Object Number: 340790  Size: SH
  15. Install the engine wiring harness bracket and bolt to the generator mounting bracket.
  16. Tighten
    Tighten the engine wiring harness bracket bolt to 25 N·m (18 lb ft).

  17. Install the generator. Refer to Generator Replacement .
  18. Install the engine cooling fan. Refer to Fan Replacement .
  19. Install the drive belt. Refer to Drive Belt Replacement
  20. Connect the battery negative cable. Refer to Battery Replacement .
  21. Install the engine cover. Refer to Engine Cover Replacement .