Engine - Piston Modification Due to Knock When Cold

90toyota05 REFERENCE ENGINE
NUMBER 028
DATE 09-21-90
MODEL SV2, ST6
TITLE 3S-FE ENGINE KNOCK PISTON MODIFICATION


To prevent engine knocking noise during cold operation, the following changes have been made to the 3S-FE piston:



1. INCREASED PISTON RIGIDITY



2. INCREASED PISTON DIAMETER 0.005 mm
NOTE: Refer to the Repair Manual for details on measuring these specifications.



PRODUCTION EFFECTIVE:



PART NUMBER INFORMATION: