Exhaust - Moan at Idle
File In Section: 6 - EngineBulletin No: 53-66-03
Date: November, 1995
Subject:
Exhaust Moan/Boom at Idle (Install Exhaust Dampener Assembly)
Models:
1994-96 Buick Century Wagon
1994-96 Oldsmobile Cutlass Ciera Wagon
with 3.1 L Engine (VIN M - RPO L82)
Condition
Some vehicles may exhibit a moan condition most apparent when vehicle is in gear, brakes applied, engine idling at normal operating temperature and
under a heavy load.
Cause
Vehicle exhaust system excited by engine exhaust pulse induced vibration.
Correction
Following procedure and illustration, install exhaust dampener assembly, P/N 10281828, securing in position shown, utilizing clamp, P/N 15595048.
1. Raise vehicle.
2. Position exhaust dampener assembly, P/N 10281828, and clamp, P/N 15595048, on exhaust intermediate pipe as shown in illustration.
3. Torque clamp nuts to 50 N.m (37 lb ft) while maintaining dampener in proper position.
4. Lower vehicle.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation Labor Time
L2008 0.3 hr