GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN 46547 Flywheel Holding Tool
    • EN-48034 Harmonic Balancer Installer
    • J 41816-A Crankshaft Balancer Remover
    • J 41816-2 Crankshaft End Protector
    • J 45059 Angle Meter

Removal Procedure

  1. Remove the radiator. Refer to Radiator Replacement.
  2. Remove the drive belt. Refer to Drive Belt Replacement.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  4. Object Number: 1302113  Size: SH
  5. Remove the service slot plug.

  6. Object Number: 1386661  Size: SH

    Important: The crankshaft balancer does not have a key-way; so the crankshaft could turn when tightening, causing an improper torque.

  7. Install the EN 46547 (1) into the flywheel teeth.
  8. Lower the vehicle.

  9. Object Number: 856226  Size: SH
  10. Remove the crankshaft balancer bolt.
  11. Discard the bolt.


    Object Number: 856227  Size: SH
  12. Install the J 41816-2 and J 41816-A to the crankshaft balancer.
  13. Important: Do not pull on outer edge of the crankshaft balancer.

  14. Remove the crankshaft balancer.
  15. Remove the J 41816-2 and J 41816-A .
  16. Clean and inspect the crankshaft balancer. Refer to Crankshaft Balancer Cleaning and Inspection.

Installation Procedure


    Object Number: 856229  Size: SH
  1. Install the crankshaft balancer using the EN-48034 .
  2. Remove the EN-48034 .
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 856226  Size: SH
  4. Install the crankshaft balancer washer and NEW bolt.
  5. Tighten

    1. Tighten the crankshaft balancer bolt to 150 N·m (111 lb ft).
    2. Use the J 45059 to rotate the crankshaft balancer bolt an additional 180 degrees.
  6. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  7. Object Number: 1386661  Size: SH
  8. Remove the EN 46547 (1) from the flywheel teeth.

  9. Object Number: 1302113  Size: SH
  10. Install the service slot plug.
  11. Lower the vehicle.
  12. Install the drive belt. Refer to Drive Belt Replacement.
  13. Install the radiator. Refer to Radiator Replacement.