Left catalytic converter sensor 4.0L (Discovery 3)

Special tool

Heated Oxygen Sensor Key 310-121 (LRT-19-014)

Removal

1.

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

Raise and support the vehicle.

2. Disconnect the left catalytic converter from the exhaust manifold. Remove and discard the two bolts.



3. Disconnect the right catalytic converter from the exhaust manifold. Remove and discard the two bolts.



4. Remove the heat shield from the catalytic converter monitoring sensor electrical connector. Remove the two bolts.





5. Using the special tool, remove the catalytic converter monitoring sensor.

• Release the wiring harness.
• Disconnect the electrical connector.

Installation

1.

CAUTION: Avoid getting anti-seize compound on the tip of the catalytic converter monitoring sensor.

CAUTION: Make sure the catalytic converter monitoring sensor harness does not have bends greater than 180 degrees and does not touch the exhaust manifold or propeller shaft.

Using the special tool, install the catalytic converter monitoring sensor.

• Clear the elements.
• Before installing the sensors, apply grease to their threads.
• Tighten the catalytic converter monitoring sensor to 45 Nm.
• Connect the electrical connector.
• Connect the wiring harness.

2. Install the heat shield. Tighten the bolts to 10 Nm.



3. Connect the right catalytic converter to the exhaust manifold.

• Clear the elements.
• Tighten the new bolts to 22 Nm.

4.

CAUTION: Make sure that the distance (A) between the nearest surfaces of the left catalytic converter and the front propeller shaft is 25-30 mm.

Connect the left catalytic converter to the exhaust manifold.

• Clear the elements.
• Tighten the new bolts to 22 Nm.