oldsmobile Workshop Repair Guides

Oldsmobile Workshop Service and Repair Manuals

Piston, Engine|Service and Repair > < Engine - Crankshaft & Bearing Size ID & Replacement|Page 1034
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Piston: Technical Service Bulletins
Engine - Update Piston-to-Bore Clearances

SUBJECT

SERVICE MANUAL UPDATE

NUMBER:  88-T-60

PISTON-TO-BORE CLEARANCES

CORP. REF. NO.:  836109

MODELS/YEARS

1982-88 FIRENZA MODELS WITH L-4 OHV

DATE:

May 1988

ENGINES

SECTION:

6A

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 and 1988 Firenza (VIN 1 Engine):

Piston-to-Bore Clearance = .025 mm - .055 mm (.00098" - .0022")

Piston-to-Pin Clearance  = .010 mm - .022 mm (.0004" - .0009")

1982 through 1986 Firenza (VIN G and P Engines):

Piston-to-Bore Clearance = .017 mm - .043 mm (.0007" - .0017")

Piston-to-Pin Clearance

1982 - 1984

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

1985 - 1986

= .005 mm - .018 mm (.0002" - .0007")

(Production)

1985 - 1986

= .010 mm - .022 mm (.0004" - .0009")

(Revised Service Parts)

Please take appropriate action to correct your service manuals.

Piston, Engine|Service and Repair > < Engine - Crankshaft & Bearing Size ID & Replacement|Page 1034