Catalytic Converter: Service and Repair

Removal Procedure





1. Raise the vehicle. Support the vehicle. Refer to Vehicle Lifting.
2. Remove the Heated Oxygen Sensor 2 (H02S2). Refer to Heated Oxygen Sensor (HO2S) Replacement (Sensor 2) in Powertrain Management.
3. Remove the one bolt and the clamp (3) securing the front pipe to the Three-Way Catalytic Converter (TWC).
Remove the two bolts securing the Three-Way Catalytic Converter (TWC) to the muffler/tail pipe assembly.
4. Remove the hangers from the rear of the TWC.
5. Remove the TWC from the vehicle.
6. Clean the gasket and seal mating surfaces.

Installation Procedure





1. Connect the Three-Way Catalytic Converter (TWC) (1) to the vehicle. Secure the front of the TWC with the clamp and one bolt. Secure the rear of the TWC with two hangers (2).
2. Install the two bolts in order to secure the TWC to the muffler/tail pipe assembly. Finger tighten the bolts.

Notice: Refer to Fastener Notice in Service Precautions.

3. Align all system components properly in order to prevent any noise or vibrations before tightening the fasteners.
^ Tighten the front pipe-to-TWC clamp bolt to 50 Nm (37 ft. lbs.).
^ Tighten the TWC-to-muffler/tail pipe assembly bolts to 50 Nm (37 ft. lbs.).
4. Install the Heated Oxygen Sensor 2 (H02S2). Refer to Heated Oxygen Sensor (HO2S) Replacement (Sensor 2) in Powertrain Management.
5. Lower the vehicle.