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All Other Service Bulletins for Piston: > < Engine - Knock At Initial Start-Up
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Piston: All Technical Service Bulletins
Engine - Piston-to-Bore Clearances

Number:

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.

All Other Service Bulletins for Piston: > < Engine - Knock At Initial Start-Up