Century Estate Wagon L4-151 2.5L VIN R TBI (1987)
Drive Belt Tensioner: All Technical Service Bulletins
Drive Belt Tensioner - Loss of Tension
DCS NO. 87-20
GROUP NO. 6
SUBJECT:
ENGINE DRIVE BELT TENSIONER - 1987 CENTURY WITH 2.5L LR8 ENGINE (VIN CODE R)
TO:
ALL BUICK DEALERS
ATTN:
SERVICE MANAGERS
BE SURE TO REVIEW THIS INFORMATION WITH ALL SERVICE DEPARTMENT PERSONNEL
SOME 2.5L CENTURYS MAY EXPERIENCE LOSS OF SERPENTINE BELT TENSION AND RESULTING OPERATION OF ACCESSORY
DRIVE COMPONENTS.
VEHICLES INVOLVED
INVOLVED ARE CERTAIN 1987 CENTURY MODELS EQUIPPED WITH 2.5L ENGINES AND ASSEMBLED WITHIN THE FOLLOWING VIN
BREAKPOINTS:
YEAR
MODEL
PLANT
FROM
THROUGH
1987
CENTURY
DORAVILLE
HD463600
HD464363
OKLAHOMA CITY
H6435334
H6438729
TARRYTOWN
HT457075
HT460666
SUSPECT TENSIONER ASSEMBLIES CAN BE IDENTIFIED BY THE FOLLOWING STAMPED CODES LOCATED ON THE TOP OF THE
TENSIONER. THE CODE IS LOCATED APPROXIMATELY 5-1/4 INCHES FROM THE TOP MOUNTING BOLT HOLE FOR THE POWER
STEERING PUMP. TENSIONER ASSEMBLIES WITH CODES 187, 197, 817, OR 917 SHOULD BE REPLACED BY PART NUMBER 10040810
AVAILABLE THROUGH GMSPO.
VEHICLES WITH SUSPECT CODES ARE TO BE HELD AT DEALERSHIP UNTIL A NEW TENSIONER HAS BEEN INSTALLED. A VIN
LISTING OF VEHICLES INSPECTED WITHOUT SUSPECT CODES SHOULD BE RECORDED. COMPLETED CAMPAIGN LABELS WITH
CAMPAIGN NUMBER 87-C-5 SHOULD BE INSTALLED ON THE RADIATOR CORE SUPPORT. CAMPAIGN BULLETIN WITH COMPLETE
INSTRUCTIONS TO FOLLOW.
B.E. ORVIS
MANAGER, TECHNICAL SERVICE
LWH/GW 6/25/87