GM Service Manual Online
For 1990-2009 cars only

Engine Flywheel Installation Automatic Transmission

Special Tools

    • J 44643 Flywheel Hold Tool
    • J 45059 Angle Meter

For equivalent regional tools, refer to Special Tools.


    Object Number: 1334818  Size: SH
  1. Install the flywheel to the crankshaft.
  2. Install the flywheel washer to the flywheel with the beveled side facing the engine.
  3. Caution: This component uses bolts with a preapplied molybdenum disulfide coating for thread lubrication. Do not remove the coating or use any additional lubricant. Improperly lubricated threads will adversely affect the bolt torque and clamp load. Improper bolt torque and clamp load can lead to engine damage.

  4. Install NEW flywheel bolts.

  5. Object Number: 660308  Size: SH
  6. Install the J 44643 tool to lock the flywheel.
  7. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 663928  Size: SH
  8. Tighten the flywheel bolts in the proper sequence.
  9. 5.1. 1st step 79 N·m (59 lb ft).
    5.2. 2nd step 60 degrees using J 45059 meter .
    5.3. 3rd step 60 degrees using J 45059 meter .

Engine Flywheel Installation Manual Transmission

Special Tools

    • J 44643 Flywheel Hold Tool
    • J 45059 Angle Meter

For equivalent regional tools, refer to Special Tools.


    Object Number: 688124  Size: SH
  1. Install the pilot bearing.

  2. Object Number: 679414  Size: SH

    Warning: When removing, handling or installing this component wear protective gloves. The sharp edges on the component may be very sharp and may cause injury.

  3. Install the flywheel.
  4. Caution: Refer to Fastener Caution in the Preface section.

    Caution: This component uses bolts with a preapplied molybdenum disulfide coating for thread lubrication. Do not remove the coating or use any additional lubricant. Improperly lubricated threads will adversely affect the bolt torque and clamp load. Improper bolt torque and clamp load can lead to engine damage.

  5. Loosely install NEW flywheel bolts.

  6. Object Number: 813861  Size: SH
  7. Install J 44643 tool to hold the flywheel from rotating.

  8. Object Number: 663928  Size: SH
  9. Use the following steps and the proper sequence to tighten the flywheel bolts:
  10. 5.1. Tighten the flywheel bolts to 79 N·m (59 lb ft).
    5.2. Tighten the flywheel bolts to 60 degrees using the J 45059 meter .
    5.3. Tighten the flywheel bolts again to 60 degrees using the J 45059 meter .
  11. Remove J 44643 tool .