3000GT AWD V6-2972cc 3.0L DOHC Turbo (1991)
Oil Pressure Regulator Valve: Customer Interest
Engine - Oil Pressure Relief Spring, Manual Update
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.