Aurora V8-4.0L VIN C (1996)
Oil Pan: All Technical Service Bulletins
Engine - Revised Specifications/Tools/Torque Specs.
File In Section: 6 - Engine
Bulletin No.: 57-61-34A
Date: March, 1996
Subject:
Section 6A2 - Engine Mechanical - New Harmonic Balancer Installation Tool, Revised Engine Specifications, and Oil Pan Torque Specification
Models:
1996 Cadillac Concours, DeVille, Eldorado, Seville
with 4.6L Engine (VINs Y, 9 - RPOs LD8, L37)
1996 Oldsmobile Aurora
with 4.0L Engine (VIN C - RPO L47)
This bulletin is being revised to change valves specifications and to add torque specification. Please discard Corporate Bulletin Number 57-61-34
(Section 6 - Engine).
The following information should be added to Section 6A2 - Engine Mechanical of the appropriate Service Manual.
New Harmonic Balancer Installation
1996 model year engines are equipped with a smaller diameter M14 crankshaft balancer bolt, which replaces the larger M18 bolt. Since this new bolt is
smaller in diameter, Kent Moore tool number J 39344 is no longer used on 1996 model engines. A new harmonic balancer tool J 41998 is now available
and must be used whenever installation of the harmonic balancer is necessary. This new bolt has a revised torque specification of 50 N.m (37 lb ft) plus
120° for installation.
Important:
A small number of 1995 engines were built with crankshafts equipped with the M14 bolt. Identify the size of the bolt to determine the proper torque
specification.
Revised Engine Specifications
