Catalytic Converter: Service and Repair

Catalytic Converter Replacement (LSJ)

Removal Procedure
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Remove the post catalytic converter heated oxygen sensor (HO2S).





3. Remove the catalytic converter pipe-to-exhaust manifold nuts.
4. Carefully separate the converter pipe from the exhaust manifold.
5. Lower the converter pipe to rest on the rear crossmember of the front suspension frame.





6. Remove the catalytic converter pipe-to-exhaust extension pipe nuts.
7. Position the converter pipe forward and support the pipe.
8. Move the extension pipe rearward and down in order to separate the pipes.
9. Remove the catalytic converter pipe assembly from the vehicle.
10. If the exhaust gaskets have remained on the vehicle, remove the gaskets from the exhaust manifold and from the exhaust extension pipe, and discard the gaskets.
11. Clean the flange surfaces of any remaining gasket material.

Installation Procedure





1. Install NEW exhaust gaskets to the exhaust manifold and to the exhaust extension pipe. The gaskets are designed to be retained to the flange by the flange studs.
2. Position the catalytic converter pipe assembly to the vehicle.
3. Move the extension pipe rearward and down in order to connect the converter pipe to the extension pipe.

4. Notice: Refer to Fastener Notice in Service Precautions.

Install the catalytic converter pipe-to-exhaust extension pipe nuts.
^ Tighten the nuts to 30 Nm (22 ft. lbs.).
5. Carefully install the converter pipe to the exhaust manifold.





6. Install the catalytic converter pipe-to-exhaust manifold nuts.
^ Tighten the nuts to 50 Nm (37 ft. lbs.).
7. Install the post catalytic converter HO2S.
8. Lower the vehicle.