ENGINE NOISE WORN PISTON PIN

Model and Year: 1985/86 CAVALIER WITH 2.OL (VIN CODE P) ENGINE

A customer comment of engine noise that is identified as an internal reciprocating noise may or may not be caused by a worn piston/piston pin interface.

If the piston is suspected of causing a cold and hot noise complaint, then the piston/piston pin interface should be examined for wear, i.e., out-of-round or grooving. The service manual procedures in Section 6A should be followed for removal and inspection of the piston and pin.

If wear conditions indicate a need for piston and pin assembly replacement, then one of the following new piston and pin assemblies should be used for the respective cylinder:

Standard Piston/Pin Asm. = P/N 10103570 High-Limit Piston/Pin Asm. = P/N 10103571 0.5mm Oversize Piston/Pin Asm. = P/N 10103572 l.0mm Oversize Piston/Pin Asm. = P/N 10103573

Select the piston/pin assembly by using the procedure described under "Piston Fitting" in Section 6A of the service manual for 2.OL engines.

Labor Operation Number: J1308

Labor Time: Varies with repair conditions (Check with Labor Time Book)

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.