SERVICE MANUAL UPDATES PISTON TO BORE CLEARANCES

Model and Year: 1982/88 CAVALIER, CORSICA, BERETTA WITH L-4 ENGINE 1982/88 S/T TRUCK WITH L-4 ENGINE

Service manual specification for the piston-to-bore clearance needs to be corrected. Following is the current model year correction, along with a restatement of past model years:

1987/88 Cavalier, Corsica, Beretta (VIN 1 Engine): -------------------------------------------------

Piston-to-bore clearance = .00098" - .0022" (.025mm - .055mm)

Piston-to-pin clearance = .0004" - .0009" (.010mm - .022mm)

1982/86 Cavalier (VIN G and P Engines): 1982/86 S/T Truck (VIN Y Engine) : -------------------------------

Piston-to-bore clearance = .0007" - .0017" (.017mm - .043mm)

Piston-to-pin clearance

1982 - 1984 = .00026" - .00037" (.007mm - .009mm)

1985 - 1986 = .0002" - .0007" (Production) (.005mm - .018mm)

1985 - 1986 = .0004" - .0009" (Revised Service Parts) (.010mm - .022mm)

Please take appropriate action to correct your service manual and inform your service personnel.

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.