Engine - Piston-to-Bore Clearances
88chevy11Number: 88-212-6A
Section: 6A
Date: APRIL, 1988
Subject: 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
TO: ALL CHEVROLET DEALERS
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"
(.025 mm - .055 mm)
Piston-to-pin clearance = .0004" - .0009"
(.010 mm - .022 mm)
1982/86 Cavalier (VIN G and P Engines):
1982/86 S/T Truck (VIN Y Engine):
Piston-to-bore clearance = .0007" - .0017"
(.017 mm - .043 mm)
Piston-to-pin clearance
1982 - 1984 = .00026" - .00037"
(.007 mm - .009 mm)
1985 - 1986 = .0002" - .0007"
(Production) (.005 mm - .018 mm)
1985 - 1986 = .0004" - .0009"
(Revised Service Parts) (.010 mm - .022 mm)
Please take appropriate action to correct your service manual and inform your service personnel.