GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 45059 Angle Meter

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Drain the cooling system. Refer to Cooling System Draining and Filling .
  3. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  4. Lower the vehicle.
  5. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  6. Remove the valve rocker arms and push rods. Refer to Valve Rocker Arm and Push Rod Replacement .
  7. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side .
  8. Remove the right spark plug wires from the spark plugs. Refer to Spark Plug Wire Replacement .
  9. Remove the right spark plugs. Refer to Spark Plug Replacement .

  10. Object Number: 54960  Size: SH
  11. Remove the fuel line bracket bolt and the stud.
  12. Remove the fuel line bracket.
  13. Remove the generator. Refer to Generator Replacement .
  14. Remove the right exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side .

  15. Object Number: 190596  Size: SH
  16. Remove the right cylinder head bolts and discard.
  17. Remove the right cylinder head.

  18. Object Number: 190597  Size: SH
  19. Remove the right cylinder head gasket.
  20. Clean and inspect the cylinder head and the gasket mating surfaces. Refer to Engine Block Cleaning and Inspection and Cylinder Head Cleaning and Inspection .

Installation Procedure


    Object Number: 190597  Size: SH
  1. Install a new right cylinder head gasket.

  2. Object Number: 190596  Size: SH
  3. Install the right cylinder head over the locator pins and the gasket.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 826677  Size: SH
  5. Install the NEW small hex cylinder head bolts (5 and 8).
  6. Install the NEW large hex cylinder head bolts (1, 2, 3, 4, 6 and 7).
  7. Tighten

    1. Tighten the cylinder head bolts a first pass in sequence to 60 N·m (44 lb ft).
    2. Tighten the cylinder head bolts a final pass in sequence to 140 degrees using the J 45059 .
  8. Install the right exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side .
  9. Install the generator. Refer to Generator Replacement .

  10. Object Number: 54960  Size: SH
  11. Install the fuel line bracket.
  12. Install the fuel line bracket bolt and the stud.
  13. Tighten
    Tighten the bolt and the stud to 50 N·m (37 lb ft).

  14. Install the right spark plugs. Refer to Spark Plug Replacement .
  15. Install the right spark plug wires to the spark plugs. Refer to Spark Plug Wire Replacement .
  16. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side .
  17. Install the push rods and valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  18. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  19. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  20. Fill the cooling system. Refer to Cooling System Draining and Filling .
  21. Inspect for leaks.