Park Avenue V6-3.8L VIN K (1995)
Heat Shield: All Technical Service Bulletins
Interior - Popping Type Noise in Passenger Compartment
File In Section 06 - Engine/Propulsion System
Bulletin No.: 99-06-05-005
Date: October, 1999
TECHNICAL
Subject:
Popping Type Noise in Passenger Compartment (Remove Rivet from Catalytic Converter Heat Shield)
Models:
1995-99 Buick Park Avenue
1997-99 Buick Riviera
2000 Buick LeSabre
1998-99 Cadillac Seville
1995-99 Oldsmobile Aurora
Condition
Some customers may comment on a popping type noise heard in the passenger compartment. This occurs after driving at highway speeds and coming to
a stop.
Cause
The source of this noise may be the catalytic converter heat shield. When air flow stops, the heat from the converter may cause the shield to expand.
Correction
Remove (drill out) the rivet from the catalytic converter heat shield. Use the following procedure and part numbers listed below.
1.
Raise and support the vehicle.
2.
Remove the screws and the oxygen sensor wiring rear shield, if applicable.
3.
Remove the nuts from the catalytic converter to the exhaust downpipe.
4.
Separate the catalytic converter from the exhaust downpipe.
5.
Remove the gasket/seal and discard.
