Oxygen Sensor: Service and Repair
1. Disconnect wire connector.
2. Remove sensor from exhaust manifold.
3. Clean threads in manifold.
4. Coat threads in replacement sensor with an anti-seize compound and install sensor into exhaust manifold.
5. On 6-258 engines, torque sensor to 31 ft. lbs.
6. Make sure that wire terminal ends are properly seated in connector, then connect wire connector. Do not push rubber boot down on sensor body closer than 1/2 inch from base. Also, oxygen sensor pigtail wires cannot be spliced or soldered. If broken, replace sensor.