Coolant Temperature Sensor/Switch (For Computer): Service and Repair

Assembly:

REMOVAL

NOTE: The engine coolant temperature sensor used by the PCM and the coolant temperature sensor used by the temperature gage in the instrument cluster are similar. The sensor used by the PCM uses two wires and the sensor used for the temperature gage has a single wire.

1. Turn ignition Off.

NOTE: Engine coolant must be drained below level of engine coolant temperature sensor before removal.

2. Disconnect electrical connector from engine coolant temperature sensor.


NOTE: The connector must be removed by squeezing the sides. Apply pressure to sides of connector gently with pliers. Do not pull on wires.

3. Remove engine coolant temperature sensor using a deep well socket.

INSTALLATION

NOTE: Tap out sensor mounting hole in engine to remove any thread sealant residue. Clean any thread sealant from sensor threads and coat sensor with correct thread sealant if installing the same sensor.

1. Apply thread sealant Saturn P/N 21485277 (Loctite(R) 242 or equivalent) to sensor threads.
2. Install engine coolant temperature sensor.

Torque to 8 Nm (71 in-lbs).

3. Connect electrical connector to the engine coolant temperature sensor. Push in until a click is heard and pull back to confirm a positive engagement.