Oxygen Sensor: Service and Repair

WARNING: Avoid physical contact with hot exhaust components.

CAUTION: Do not pull on or cut sensor wires, when removing sensor.

CAUTION: Use of excessive force may damage threads in exhaust manifold or pipe.

REMOVAL
1. Disconnect oxygen sensor electrical connector.
2. Using a suitable tool (Snap-On socket YA8875, or equivalent), carefully remove the sensor from exhaust manifold or pipe. (Slightly tightening the sensor before removal may ease removal.)
3. Clean threads in exhaust manifold with an 18 mm X 1.5 + 6E tap.

INSTALLATION
1. If a new sensor is being used, verify that the threads are coated with anti-seize compound, before installing in manifold or pipe.
2. If sensor is being reused, coat sensor threads with a nickel based anti-seize compound, (Loctite 771-64 or equivalent).

CAUTION: Do not use graphite or other anti-seize compounds.

3. Install sensor, and tighten to 27 Nm (20 ft-lbs).
4. Connect wiring.