Corsica L4-121 2.0L (1988)
Piston: Customer Interest
Engine - Knock At Initial Start-Up
Number:
89-242-6A
Section:
6A
Date:
August 1989
Corporate Bulletin No.: 936120
Subject:
COLD ENGINE PISTON KNOCK
Model and Year:
1987-89 J AND L CARS WITH 2.0L ENGINE
TO:
ALL CHEVROLET DEALERS
Some customers may comment of a cold engine knock at initial vehicle start-up. This condition may be repaired by installation of tighter fitting pistons
available through service parts:
P/N 10112367
0.04 mm O.S.
P/N 10112368
0.50 mm O.S.
P/N 10112369
1.00 mm O.S.
Parts are currently available from GMSPO.
Piston fit should be reduced to .0008" - .0015" clearance. The cylinder case may need to be honed to achieve the desired piston fit. Refer to the Service
Manual Section 6A-20 for proper piston fit instructions.
Labor Operation Number:
J1308
Labor Time:
5.4 Hours
Add:
.3 With Automatic Transmission