GM Service Manual Online
For 1990-2009 cars only

    Object Number: 909631  Size: SH

    Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

  1. Clean the crankshaft balancer in solvent.
  2. Clean the belt grooves of all dirt or debris with a wire brush.
  3. Inspect the crankshaft balancer for the following:
  4.    Important: A crankshaft balancer 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.

    • Worn, grooved, or damaged hub seal surface

       Important: In order for the belt to track properly, the belt grooves should be free of all dirt, debris, nicks, gouges or other damage. Minor imperfections may be removed with a fine file.

    • Dirty or damaged belt grooves.
    • Worn, chunking or deteriorated rubber between the hub and pulley

    Object Number: 909631  Size: SH

    Warning: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

  1. Clean the crankshaft balancer in solvent.
  2. Clean the belt grooves of all dirt or debris with a wire brush.
  3. Inspect the crankshaft balancer for the following:
  4.    Note: A crankshaft balancer 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.

    • Worn, grooved, or damaged hub seal surface

       Note: In order for the belt to track properly, the belt grooves should be free of all dirt, debris, nicks, gouges or other damage. Minor imperfections may be removed with a fine file.

    • Dirty or damaged belt grooves.
    • Worn, chunking or deteriorated rubber between the hub and pulley