Catalytic Converter: Service and Repair

Removal Procedure
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. Disconnect the heated oxygen sensor electrical connector.
3. Remove the exhaust manifold pipe stud nuts.





4. Remove the catalytic converter bolts.
5. Remove the three way catalytic converter.
6. Remove the exhaust manifold pipe gasket at the catalytic converter front flange.





7. Remove the heated oxygen sensor. Refer to Heated Oxygen Sensor (HO2S) Replacement (H02S1) or Heated Oxygen Sensor (HO2S) Replacement (HO2S2) in Computers and Controls.

Installation Procedure





1. Install the heated oxygen sensor. Refer to Heated Oxygen Sensor (HO2S) Replacement (HO2S1) or Heated Oxygen Sensor (HO2S) Replacement (HO2S2) in Computers and Controls.
2. Install a new exhaust manifold pipe gasket to the exhaust manifold pipe studs.

Notice: Refer to Catalytic Converter Movement Notice in Service Precautions.





3. Install and support the three way catalytic converter.
4. Install the catalytic converter bolts.





5. Install the exhaust manifold pipe stud nuts.

Notice: Refer to Fastener Notice in Service Precautions.

6. - Tighten the exhaust manifold pipe stud nuts to 32 Nm (24 ft. lbs.).
- Tighten the catalytic converter bolts to 45 Nm (33 ft. lbs.).
7. Connect the heated oxygen sensor electrical connector.
8. Inspect for leaks and underbody contact.
9. Lower the vehicle.