CRACKED WATER PUMP PULLEY NEW PULLEY P/N RELEASED

Model and Year: 1985 CK10-30 WITH 6.2L DIESEL ENGINE AND AIR CONDITIONING

TO: ALL CHEVROLET DEALERS

Some water pump pulleys on the above listed 1985 vehicles, equipped with 6.2L diesel engines and air conditioning may experience a crack in the area where the pulley is bolted to the water pump flange.

To correct this condition, a new water pump pulley, P/N 15550089, is available. The new pulley contains a reinforcing cup located on the outside of the pulley hub.

Because it is thicker than the pulley it replaced, this new pulley requires longer mounting studs. Four new studs are included with the pulley, and it is MANDATORY that all four studs are installed with the new pulley to assure proper clamp load.

This new pulley can be used on either VIN Code C or J engines and is currently available through WDDGM.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.