GM Service Manual Online
For 1990-2009 cars only

Special Tools

J-45059 Angle Meter

Removal Procedure


    Object Number: 1582091  Size: SH
  1. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  2. Drain the cooling system. Refer to Cooling System Draining and Filling .
  3. Lower the vehicle.
  4. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  5. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement .
  6. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .

  7. Object Number: 52299  Size: SH
  8. Remove the left spark plugs. Refer to Spark Plug Replacement .
  9. Remove and discard the cylinder head bolts.
  10. Remove the cylinder head.

  11. Object Number: 54362  Size: SH
  12. Remove and discard the cylinder head gasket.
  13. Remove the cylinder head dowel pins, if necessary.

Installation Procedure


    Object Number: 1557858  Size: SH

    Caution: Head gaskets are specific for right hand and left hand applications, and also must be installed with the correct side facing up. Note the markings (1) on the head gaskets for proper installation. Failure to do so may lead to engine damage.

  1. Clean the gasket mating surfaces.
  2. Install the spark plugs to the cylinder head.
  3. Install the cylinder head locator dowel pins, if necessary.
  4. Inspect the cylinder head locator dowel pins for proper installation.

  5. Object Number: 54362  Size: SH
  6. Install a NEW cylinder head gasket.

  7. Object Number: 52299  Size: SH
  8. Install the cylinder head onto the locator pins and the engine.
  9. Caution: 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.

  10. Install the NEW cylinder head bolts finger tight.
  11. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 826677  Size: SH
  12. Install the NEW small hex cylinder head bolts (5 and 8).
  13. Install the NEW large hex cylinder head bolts (1, 2, 3, 4, 6 and 7).
  14. • Tighten the cylinder head bolts a first pass in sequence to 60 N·m (44 lb ft) .
    • Tighten the cylinder head bolts a final pass in sequence to 140 degrees using the J-45059 Angle Meter .

    Object Number: 1582091  Size: SH
  15. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  16. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side .
  17. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  18. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement .
  19. Fill the cooling system. Refer to Cooling System Draining and Filling .
  20. Inspect for leaks.