Catalytic Converter: Service and Repair

CAUTION: When servicing exhaust system or removing exhaust components, disconnect all heated oxygen sensors at the wiring connectors to prevent damage to the heated oxygen sensors and wiring harness.

Exhaust System:

Exhaust System:

Single Exhaust System

Exhaust System:

Exhaust System:

Dual Exhaust System

REMOVAL
1. Raise vehicle.
2. Remove the retaining bolts at each Three-Way Catalytic Converter (TWC) flange.
3. Remove the TWC to exhaust manifold retaining nuts.
4. Slide the exhaust inlet pipe rearward until the TWC converters can be removed. It may be necessary to obtain sufficient clearance to separate the TWC converter at exhaust manifold connections.
5. Discard exhaust converter outlet gaskets and any damaged parts.

INSTALLATION
1. Remove exhaust converter outlet gasket material from exhaust inlet pipe and the TWC converters.
2. Position the TWC converters to the exhaust manifolds. Loosely install retaining nuts.
3. Install new exhaust converter outlet gaskets between the TWC converters and exhaust inlet pipe flanges. Position the exhaust inlet pipe flange to the TWC converter outlet flange and insert new retaining bolts.
4. Alternately tighten the TWC catalytic converter to the exhaust inlet pipe flange retaining bolts to 34-46 Nm (26-33 lb ft).
5. Align the system to proper clearance specification.
6. Alternately tighten the exhaust manifold nuts to 34-46 Nm (26-33 lb ft).
7. Check the system for leaks.
8. Lower the vehicle.