GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 173172  Size: SH
  1. Remove the upper and lower fan shroud assembly. Refer to Fan Shroud Replacement in Engine Cooling.
  2. Remove the drive belt. Refer to Drive Belt Replacement .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Remove the crankshaft balancer bolt.

  5. Object Number: 310245  Size: SH
  6. Remove the crankshaft pulley bolts.
  7. Remove the crankshaft pulley.
  8. Notice: To prevent damage to the end of the crankshaft when using a crankshaft balancer removal tool install a bolt in the crankshaft. Use a shorter bolt with the same threads as the crankshaft balancer bolt. This bolt will allow a place for the tool to push against. The shorter bolt is to keep from going past the threads in the crankshaft and damaging the crankshaft threads.

  9. Remove the crankshaft balancer. Refer to Crankshaft Balancer Removal .
  10. Clean and inspect all parts. Refer to Crankshaft Balancer Cleaning and Inspection .

Installation Procedure


    Object Number: 310245  Size: SH
  1. Install the crankshaft balancer. Refer to Crankshaft Balancer Installation .
  2. Install the crankshaft pulley.
  3. Loosely install the crankshaft pulley bolts.

  4. Object Number: 173172  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the crankshaft balancer bolt.
  6. Tighten

    1. Tighten the crankshaft balancer bolt to 95 N·m (70 lb ft).
    2. Tighten the pulley bolts to 58 N·m (43 lb ft).
  7. Lower the vehicle.
  8. Install the drive belt. Refer to Drive Belt Replacement .
  9. Install the fan shroud assembly. Refer to Fan Shroud Replacement in Engine Cooling.