Converter

Catalytic Converter Replacement (3.4L)

Removal Procedure

Important: The 3-way catalytic converter is serviced by replacing the entire assembly. Always replace the gaskets when servicing the 3-way catalytic converter assembly. Never install the original gaskets.

1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Disconnect the Heated Oxygen Sensor (HO2S) electrical connector.
3. Remove the exhaust manifold pipe stud nuts.





4. Remove the exhaust manifold pipe gasket.





5. Remove the catalytic converter nuts.





6. Remove the catalytic converter hangers.
7. Remove the 3-way catalytic converter.
8. Remove the gasket from the exhaust pipe.
9. Clean and inspect the exhaust manifold and the exhaust pipe gasket mating surfaces.





10. Remove the Heated Oxygen Sensor (HO2S) from the catalytic converter.

Installation Procedure





1. Install the Heated Oxygen Sensor (HO2S) to the catalytic converter.





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

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

4. Install and support the 3-way catalytic converter.
5. Install the catalytic converter nuts.





Notice: Refer to Fastener Notice in Service Precautions.

6. Install the exhaust manifold pipe stud nuts.
^ Tighten the exhaust manifold pipe stud nuts to 32 Nm (24 ft. lbs.).
^ Tighten the catalytic converter nuts to 60 Nm (44 ft. lbs.).





7. Install the catalytic converter hangers.
8. Connect the Heated Oxygen Sensor (HO2S) electrical connector.
9. Lower the vehicle.
10. Inspect the exhaust system for leaks.