GM Service Manual Online
For 1990-2009 cars only

Cylinder Head Replacement Left

Special Tools

J 36660-A Electronic Torque Angle Meter

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Drain the engine coolant from 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 upper intake manifold. Refer to Intake Manifold Replacement .
  6. Remove the valve rocker arm covers.
  7. Remove the lower intake manifold. Refer to Intake Manifold Replacement .
  8. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  9. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  10. Remove the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement .
  11. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  12. Remove the left (front) spark plug wires from the spark plugs. Refer to Spark Plug Wire Harness Replacement .
  13. Remove the left (front) spark plugs. Refer to Spark Plug Replacement .
  14. Remove the left (front) exhaust manifold. Refer to Exhaust Manifold Replacement .

  15. Object Number: 190595  Size: SH
  16. Remove and discard the left (front) cylinder head bolts.
  17. Remove the left (front) cylinder head.

  18. Object Number: 190594  Size: SH
  19. Remove the left (front) cylinder head gasket.
  20. Clean the following areas:
  21. • The gasket sealing surfaces on the cylinder head, cylinder block, and intake manifolds.
    • The cylinder block bolt threads.

Installation Procedure


    Object Number: 190594  Size: SH
  1. Install a new left (front) cylinder head gasket.

  2. Object Number: 190595  Size: SH
  3. Install the left (front) cylinder head over the locator pins and over the gasket.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 54295  Size: SH

    Notice: This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.

  5. Tighten the left (front) cylinder head bolts (1-8) in sequence.
  6. Tighten

        • Tighten the cylinder head bolts (1-8) in sequence to 60 N·m (44 lb ft).
        • Use the J 36660-A in order to turn the cylinder head bolts (1-8) in sequence an additional 95 degrees.
  7. Install the left (front) exhaust manifold. Refer to Exhaust Manifold Replacement .
  8. Install the left (front) spark plugs. Refer to Spark Plug Replacement .
  9. Install the left (front) spark plug wires to the spark plugs. Refer to Spark Plug Wire Harness Replacement .
  10. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  11. Install the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement .
  12. Install the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  13. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  14. Install the lower intake manifold. Refer to Intake Manifold Replacement .
  15. Install the valve rocker arm covers.
  16. Install the upper intake manifold. Refer to Intake Manifold Replacement .
  17. Fill the engine with new engine oil. Refer to Engine Oil and Oil Filter Replacement .
  18. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling .

Cylinder Head Replacement Right

Special Tools

J 36660-A Electronic Torque Angle Meter

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Drain the engine coolant from 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 upper intake manifold. Refer to Intake Manifold Replacement .
  6. Remove the valve rocker arm covers.
  7. Remove the lower intake manifold. Refer to Intake Manifold Replacement .
  8. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  9. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  10. Remove the right (rear) spark plug wires from the spark plugs. Refer to Spark Plug Wire Harness Replacement .
  11. Remove the fuel line bracket. Refer to Engine Controls.
  12. Remove the generator brace. Refer to Generator Brace Replacement .
  13. Remove the right (rear) spark plugs. Refer to Spark Plug Replacement .
  14. Remove the right (rear) exhaust manifold. Refer to Exhaust Manifold Replacement .

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

  18. Object Number: 190597  Size: SH
  19. Remove the right (rear) cylinder head gasket.
  20. Clean the following areas:
  21. • The gasket sealing surfaces on the cylinder head, cylinder block, and intake manifolds.
    • The cylinder block bolt threads.

Installation Procedure


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

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


    Object Number: 54295  Size: SH

    Notice: This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.

  5. Tighten the right (rear) cylinder head bolts (1-8) in sequence.
  6. Tighten

        • Tighten the cylinder head bolts (1-8) in sequence to 60 N·m (44 lb ft).
        • Use the J 36660-A in order to turn the cylinder head bolts (1-8) in sequence an additional 95 degrees.
  7. Install the right (rear) exhaust manifold. Refer to Exhaust Manifold Replacement .
  8. Install the right (rear) spark plugs. Refer to Spark Plug Replacement .
  9. Install the right (rear) spark plug wires to the spark plugs. Refer to Spark Plug Wire Harness Replacement .
  10. Install the generator brace. Refer to Generator Brace Replacement in Engine Electrical.
  11. Install the fuel line bracket. Refer to Engine Controls.
  12. Install the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  13. Install the pushrods and valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  14. Install the lower intake manifold. Refer to Intake Manifold Replacement .
  15. Install the valve rocker arm covers.
  16. Install the upper intake manifold. Refer to Intake Manifold Replacement .
  17. Fill the engine with new engine oil. Refer to Engine Oil and Oil Filter Replacement .
  18. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling .