Catalytic Converter: Service and Repair

1. Disconnect the oxygen sensor electrical connector.
2. Disconnect the auxiliary air hoses at the air tube.
3. If necessary, remove the muffler support brackets then separate the muffler/exhaust assembly from the catalytic converter/Y-pipe assembly.
4. Remove the retaining screws from Y-pipe assembly at the exhaust manifolds and remove the converter/Y-pipe assembly from the vehicle.
5. Install the converter/Y-pipe assembly to the exhaust manifold and loosely tighten the fasteners.
6. Install the muffler/exhaust assembly to the converter/Y-pipe assembly. Align the exhaust then install the U-bolt and tighten to 35-40 lb. ft. (47-54 N-m).
7. If previously removed, install the exhaust support brackets.
8. Torque the Y-pipe to exhaust manifold bolts to 25-36 lb. ft. (34-49 N-m).
9. Reconnect the oxygen sensor and auxiliary air hoses.