Catalytic Converter: Service and Repair

Removal Procedure

Important: The three-way catalytic converter is serviced by replacing the entire assembly. Always replace the gasket at the front flange when servicing the three-way catalytic converter assembly. Never reinstall the original gasket.





1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Remove the heated oxygen sensor.

Notice: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.

3. Suitably support the exhaust system.





4. Remove the three-way catalytic converter bolts.





5. Remove the exhaust manifold pipe stud nuts.
6. Remove the three-way catalytic converter.
7. Remove the exhaust manifold pipe gasket at the exhaust manifold pipe studs.


Installation Procedure





1. Install a new exhaust manifold pipe gasket to the exhaust manifold pipe studs.

Notice: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.

2. Install and support the three-way catalytic converter.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the exhaust manifold pipe stud nuts.
- Tighten the exhaust manifold pipe stud nuts to 32 Nm (24 ft. lbs.).





4. Install the three-way catalytic converter bolts.
- Tighten the three-way catalytic converter bolts to 45 Nm (33 ft. lbs.).





5. Install the heated oxygen sensor.
6. Lower the vehicle.
7. Inspect the exhaust system for leaks and underbody contact.