Cutlass Supreme FWD V6-189 3.1L (1989)
Technical Service Bulletin # 90T211
Date: 930801
Engine - Knocking Noise at Low Ambient Temperatures
NUMBER: 90-T-211
CORP. REF. NO.:
DATE: AUGUST 1993
SECTION: 6A, V-6
SUBJECT:
COLD CLIMATE SPECIAL POLICY ADJUSTMENT 3.1 LITER ENGINE PISTON PLAYING WEAR
MODELS/YEARS:
1989 CUTLASS SUPREME and 1990 SILHOUETTE
CONDITION
General Motors has determined that some 1989 Oldsmobile Cutlass Supreme model vehicles built with the 3.1L LHO (VIN T) engine and some 1990
Oldsmobile Silhouette model vehicles built with the 3.1L LG6 (VIN D) engine may develop a condition of premature wear of the pistons due to low
adhesion of the tin plating. Evidence of this condition would be a cold engine knocking noise at low ambient temperatures. This condition will not lead
to engine failure and is typically limited to cylinders # 2, # 4, and # 6.
Vehicles Involved
Involved are 1989 Oldsmobile Cutlass Supreme model vehicles built with the 3.1L LHO (VIN T) engine and 1990 Oldsmobile Silhouette model vehicles
built with the 3.1L LG6 (VIN D) engine within the breakpoints, (built from Start-of-Production to End-of-Production).
SPECIAL POLICY ADJUSTMENT
This special policy covers the condition described above on vehicles in specific cold climate states for a period of six (6) years or 72,000 miles,
whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. If piston replacement is required due to this
condition, an engine replacement should be made at no charge to the owner rather than replacement of individual pistons. This special policy adjustment
applies ONLY to repair required as a RESULT of the described condition; it does not cover other conditions which may necessitate a partial engine
replacement.
OWNER NOTIFICATION
Owners in specific cold climate states will be notified of this special policy on their vehicles by Oldsmobile Division (see copy of the owner letter
included with this bulletin).
States Involved In Owner Notification
The list of states defined as "cold climate states.
See illustration.
OWNER REIMBURSEMENT