Engine - Oil Pressure Relief Spring, Manual Update

91mitsubishi03

NO. TSB-91-11-004

DATE February, 1991

MODEL 3000GT


SUBJECT:
OIL PRESSURE RELIEF VALVE SPRING SERVICE - MANUAL UPDATE



TSB Revision TSB-91-11-004

PURPOSE

A modified oil pressure relief valve spring has been introduced into 1991 3000GT models on October 2, 1990 beginning with engine number NM8016. As a result of this change the Relief Spring information shown in the 1991 3000GT Service Manual should be revised. Also, the existing load specification and dimension have been changed as shown below.

As reference to this bulletin, please write this TSB number in the TSB Revision box on the affected page.

DETAILS OF CHANGE


BEFORE ON OR AFTER
10-2-91 10-2-91

FREE LENGTH mm (in.) 43.8 (1.724) 46.3 (1.823)

LOAD WHEN COMPRESSED TO 97N 115N
34.3 mm (1.350 in.) 21 lbs. 25 lbs.


NOTE: When replacing the oil pressure relief valve spring, match the length of the replacement spring to the one being replaced.





SERVICE MANUAL UPDATE

1991 3000GT, page 11-7.

Please make the changes shown.