Popping Type Noise In Passenger Compartment (Remove Rivet From C/C Heat Shield)
| 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.
- Raise and support the vehicle.
- Remove the screws and the oxygen sensor wiring rear shield, if applicable.
- Remove the nuts from the catalytic converter to the exhaust downpipe.
- Separate the catalytic converter from the exhaust downpipe.
- Remove the gasket/seal and discard.
- Locate the rivet above separated flange at the center of the converter heat shield.
- Drill out the rivet using a 5 mm (3/16 in) or larger drill bit.
- Install new gasket/seal.
- Install the catalytic converter to the exhaust downpipe and the nuts.
- Install the oxygen sensor wiring rear shield and screws.
- Lower the vehicle.
Tighten
Tighten the nuts to 24 mm (18 lb ft).
Parts Information
Part Number | Description | Usage | Quantity |
|---|---|---|---|
03537820 | Seal, Exhaust Manifold RR Pipe | 1995 Oldsmobile Aurora | 1 |
24506449 | Seal, Exhaust Manifold RR Pipe | 1995-96 Buick Riviera (L36) | 1 |
24504545 | Seal, Exhaust Manifold RR Pipe | 1995 Buick Riviera (L67) | 1 |
03544534 | Gasket, CTLTC Converter | 1996-99 Oldsmobile Aurora 1997-99 Buick Park Avenue 1998-99 Buick Riviera 2000 Buick LeSabre | 1 |
24506930 | Gasket, CTLTC Converter | 1997 Buick Riviera | 1 |
12554724 | Gasket, Exhaust Manifold Pipe | 1998-99 Cadillac Seville | 1 |
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
L2090 | Seal, Front Exhaust Pipe - Replace (1995-96) | 0.3 hr |
L2180 | Gasket, Exhaust Manifold Pipe to Catalytic Converter - Replace (1997-2000) | 0.3 hr |
Add | Drilling Out Rivet | 0.2 hr |
This time is updated from the current Labor Time Guide. The next issue will contain this change. | ||
