Navajo 4WD V6-4.0L OHV (1991)
Oxygen Sensor: Service and Repair
NOTE: Oxygen sensor wiring and connector are permanently attached. Attempted removal may damage the sensor and affect proper operation.
1.
Disconnect sensor electrical harness from vehicle harness at connector.
2.
Using a suitable tool, carefully unscrew and remove sensor from vehicle.
CAUTION:Sensor removal may be difficult if engine temperature is below 120°F. Excess force may damage threads.
3.
If a new sensor is being installed, screw into place and torque to 30 - 35 ftlb (40 - 50 Nm).
4.
If a sensor is being reinstalled, carefully apply anti-seize compound to threads, screw into place and torque as in step 3.
5.
Reconnect electrical harness, taking care to route wiring away from exhaust pipe and manifold.