GM Service Manual Online
For 1990-2009 cars only

    Object Number: 464734  Size: SH
  1. Clean the crankshaft pulley with a cloth and denatured alcohol.
  2. Clean the belt grooves of all dirt or debris with a wire brush.
  3. Caution: Wear safety glasses in order to avoid eye damage.

  4. Dry the crankshaft pulley with compressed air.
  5. Inspect the crankshaft pulley for the following:
  6. • Worn, grooved, or damaged hub seal surface.
    • A crankshaft pulley hub seal surface with excessive scoring, grooves, rust or other damage must be replaced.
    • Minor imperfections on the hub seal surface may be removed with polishing compound or fine grade emery cloth.

       Important: In order for the belt to track properly, the belt grooves should be free of all dirt or debris.

    • Dirty or damaged belt grooves.
    • The pulley belt grooves should be free of any nicks, gouges, or other damage that may not allow the belt to track properly.
    • Minor imperfections may be removed with a fine file.
    • Worn, chunking or deteriorated rubber between the hub and pulley.