Catalytic Converter: Service and Repair

PROCEDURE

Removal - Front Catalytic Converter





1. Remove No. 2 front exhaust pipe (front Converter).
- Check that the Converter is cool.





- Remove the 2 bolts and nuts holding the No. 2 front exhaust pipe to the front exhaust pipe.
- Remove the 2 bolts and pipe support bracket from the transmission.
- Disconnect the front exhaust pipe from the No. 2 front exhaust pipe, and remove the gasket.





- Remove the 4 nuts, No. 2 front exhaust pipe and 2 gaskets.

Installation - Front Catalytic Converter





- Install 2 new gaskets and the No. 2 front exhaust pipe to the exhaust manifolds with 4 new nuts.

Torque: 62 Nm (46 ft lb)

- Install the pipe support bracket to the transmission with the 2 bolts.

Torque: 43 Nm (32 ft lb)

- Install a new gasket to front end of the front exhaust pipe, and torque the front exhaust pipe to the No. 2 front exhaust pipe.

Torque: 43 Nm (32 ft lb)

Removal - Rear Catalytic Converter





1. Disconnect Sub Heated Oxygen Sensor from front exhaust pipe (Calfornia only).
- Disconnect the wire grommet from the floor.
- Remove the 2 bolts and sensor cover.
- Disconnect the Oxygen Sensor from the exhaust pipe.





2. Remove front exhaust pipe (rear Converter).
- Remove the 2 bolts holding the front exhaust pipe to the center exhaust pipe.
- Remove the 2 bolts and nuts holding the front exhaust pipe to the No.2 front exhaust pipe.
- Remove the front exhaust pipe and 2 gaskets.

Installation - Rear Catalytic Converter





1. Reinstall front exhaust pipe (rear Converter). Install 2 new gaskets, the front exhaust pipe with the 4 bolts and 2 new nuts.

Torque: 43 Nm (32 ft lb)





2. Reconnect Sub Heated Oxygen Sensor (California only).
- Install the oxygen sensor to the front exhaust pipe.

Torque: 44 Nm (33 ft lb)

NOTE: Before installing the oxygen sensor, twist the sensor wire counterclockwise 3 and a half turns. After installing the oxygen sensor, check that the sensor wire is not twisted. If it is twisted, remove the oxygen sensor and reinstall it.

- Install the sensor cover with the 2 bolts.
- Install the wire grommet to the floor.