GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 37872 Universal Spanner Wrench

Removal Procedure

  1. Remove the compressor. Refer to Air Conditioning Compressor Replacement .

  2. Object Number: 872553  Size: SH

    Important: Remove the three adjustable dowels from the Universal Spanner Wrench.

    Install three 5/16 x 1 inch bolts in place of the dowels.

  3. Remove and discard the compressor clutch plate bolt. Use the J 37872 to hold the compressor clutch plate from turning.

  4. Object Number: 872556  Size: SH
  5. Remove the compressor clutch plate.

Installation Procedure

  1. Carefully clean the clutch plate bolt threads with a M6x1.0 tap. Carefully blow out debris with compressed air.
  2. Place a small amount of oil on the 0.4 mm (0.016 in) air gap shim and place inside the clutch drive plate.

  3. Object Number: 872556  Size: SH
  4. Install the compressor clutch plate.

  5. Object Number: 187363  Size: SH

    Important: Make certain that the drive plate does not drag against the pulley when the pulley is rotated.

  6. Measure the air gap between the pulley and the drive plate. Adjust the shims to achieve a 0.3-0.6 mm (0.012-0.024 in) air gap.

  7. Object Number: 872553  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.

  8. Make certain that the new drive plate bolt has colored adhesive on at least 5 threads. Install the clutch drive plate bolt. Use the J 37872 to hold the compressor clutch plate from turning.
  9. Tighten
    Tighten the compressor clutch drive plate bolt to 12 N·m (9 lb ft).

  10. Install the compressor. Refer to Air Conditioning Compressor Replacement .
  11. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging .
  12. Leak test the fittings using the J 39400-A .