Impreza Coupe AWD F4-1820cc 1.8L SOHC (1995)
Heated Oxygen Sensor: Service and Repair
REMOVAL
1.
Warm the engine to operating temperature. This will aid in the removal of the sensor.
CAUTION: Exhaust components are extremely hot. Use gloves and other protective clothing when working near the exhaust.
2.
Remove air intake duct.
O2 Sensor Connector
3.
Disconnect sensor electrical connector.
4.
Raise the vehicle to allow access to underside.
5.
Spray the base of the sensor with penetrating fluid.
O2 Sensor
6.
Remove the sensor.
NOTE: When removing the sensor, do not force, especially if the exhaust is cool. Damage may occur to the sensor and exhaust.
INSTALLATION
O2 Sensor Threads
1.
Apply a light coating of anti-seize compound to the threads of the sensor.
NOTE: Do not apply compound to the louvered (protector) area of the sensor.
2.
Install in reverse order. Tighten sensor to 41 - 47 Nm (30 - 35 ft lb).
