Engine - Rattle Noise Between Idle and 1500 RPM
90buick08Bulletin : 90-6-6
Date : June, '90
Ref. No. 90-124-6
Corp. Ref. No. : 006102R
SUBJECT: RATTLE TYPE NOISE FROM REAR OF ENGINE (NEW PART)
MODELS AFFECTED: 1988-90 - 3800 V-6 ENGINE - CENTURY, ELECTRA/PARK AVENUE, RIVIERA, REATTA AND LESABRE
A "tinny" rattling noise may be heard at the rear of the engine (hot engine) between idle and 1500 rpm's. This type of noise can sometimes be corrected by installing a larger timing chain dampener.
The dampener, part number 25535668, went into production engines used in LeSabre and Electra/Park Avenues on January 2, 1990 and into production engines used in Riviera/Reattas on January 22, 1990. The date the engine was built can be found on a sticker on the rear valve cover and can be viewed by looking past the brake master cylinder from the driver's side of the car.
Parts are currently available from GMSPO.