DeVille d Elegance V8-4.6L VIN Y (1998)
Technical Service Bulletin # 87-61-20
Date: 980301
Engine - Chirpy/Ticking/Knocking Noises
File In Section: 6 - Engine
Bulletin No.: 87-61-20
Date: March, 1998
Subject:
Accessory Drive Noise
(Follow Diagnostic Procedures)
Models:
1998 Cadillac DeVille, Eldorado, Seville, Commercial Chassis
1998 Oldsmobile Aurora with 4.OL, 4.6L Engine (VINs C, V, 9 - RPOs L47, LD8, L37) Built Prior to February 1, 1998
Condition
Some owners may comment about chirping, ticking, knocking, or "trashy" noises from the front of the engine. The service writer and technician should
note in writing on the Repair Order the conditions associated with the noise such as outside ambient and engine operating temperatures, and when the
noise is observed. The service writer should personally observe and describe the type and location of noise on the Repair Order. The noise may sound
like an under hood squeak, a metallic trashy noise, or an inside vehicle thump, etc. The service writer should ask the owner if the noise occurs following
start up after an overnight soak, and whether the noise reduces or goes away completely as the engine warms up. Write the customer response on the
Service Repair Order.
Cause
This condition may be caused by pulley misalignment of the accessory drive system.
Parts Information
When performing this operation use the information shown:
Part Number
Description
12555239
Accessory drive belt -
Seville only
12560973
Accessory drive belt -
Cadillac except Deville without
KG9 option and Seville
12560974
Accessory drive belt -
Cadillac with KG9 option
12561088
Accessory drive belt -
Oldsmobile Aurora
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
T2267
Accessory Drive
1.3 hrs (E/K Cars)
Service
1.6 hrs (G Cars)
Correction
The corrective procedure has been developed for the 4.0L and 4.6L engines identified, and can be used to service 4.0L and 4.6L engines exhibiting these
noises. If a vehicle is encountered with any of the above concerns and the condition is still present after completing all of the diagnostic procedures listed
in the Service Manual, then perform the procedures shown:
