Engine Accessory Drive Belt - Noise
Group Ref.: 6 - EngineBulletin No.: 476004
Date: June, 1994
SUBJECT:
ACCESSORY DRIVE BELT NOISE (INSTALL NEW SERPENTINE BELT)
MODELS:
1993 CADILLAC ALLANTE
1993-94 CADILLAC ELDORADO AND SEVILLE
1994 CADILLAC CONCOURS
WITH 4.6L ENGINE (VINs 9, Y - RPOs LD8, L37)
1995 OLDSMOBILE AURORA
WITH 4.0L ENGINE (VIN C - RPO L47)
CONDITION:
Some owners may experience accessory drive belt noise. This noise condition is most noticeable at idle.
CAUSE:
Accessory drive belt noise may be caused by "pilling" of the serpentine belt.
Serpentine belt pilling may result from deposits adhering to the belt and/or accessory drive pulleys. These deposits distort the "V" shaped geometry of the belt, causing a chirp sound as the belt seats into the pulley grooves.
CORRECTION:
A new serpentine belt has been developed to address this condition. Inspect the part number on the belt; if it reads 3542324, remove the belt as described in Section 6B2 of the Service Information Manual. Before installing the new serpentine belt, clean the grooves of the pulleys with a nylon bristle brush to remove any serpentine belt deposits.
PART INFORMATION:
Use the following part numbers when accessory drive belt replacement is necessary.
Description Part Number Application
Accessory Drive 12553287 4.6L LD8 and
Belt L37 Engines
Accessory Drive 12553287 4.0L L47 Engine
Belt
Parts are expected to be available from GMSPO July 11, 1994.
WARRANTY INFORMATION:
For vehicles repaired under warranty, use:
Labor Operation Labor Time
J0667 Use published labor
times.