Left catalytic converter 4.0L (Discovery 3)

Special tool

HO2S Sensor Key 310-121 (LRT-19-014)

Removal

1. Disconnect the ground cable from the battery. For more information, refer to Specification.

2.

CAUTION: Never work on a vehicle supported solely by a jack. Always support the vehicle securely.

Raise and support the vehicle.

3. Remove the exhaust system. For more information, refer to Exhaust System (10/30/08)

4. Remove the catalytic converter. Unscrew the nut and release the clamp.

5.

NOTE: Do not perform further disassembly if the component is removed only for access.

Using the special tool, remove both HO2S sensors from the catalytic converter.

Installation

1.

CAUTION: Avoid getting grease on the tip of the HO2S sensor.

Using the special tool, install the HO2S sensor to the catalytic converter and tighten to 45 Nm.

• Clear the elements.
• Apply grease to the HO2S sensor threads.

2.

NOTE: Do not tighten the clamp at this stage.

Connect the catalytic converter to the front muffler.

• Clear the elements.
• Screw on the nut.

3. Install the exhaust system. For more information, refer to Exhaust System (10/30/08)

4. Tighten the catalytic converter clamp to 55 Nm.

5. Connect the ground cable to the battery. For more information, refer to Specification.