Cruze

Engine Coolant Temperature Sensor Replacement

Warning: With a pressurised cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the wings, and the person removing the cap. Serious bodily injury may result.

1. Open the bonnet.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Drain coolant fluid. Refer to Cooling System Draining and Filling .
4. Lower the vehicle.
5. Unclip the engine control module bracket and hang the engine control module aside.




Note: Place a container beneath to collect any draining coolant.

6. Disconnect the engine coolant temperature sensor electrical connector (3).
7. Remove the engine coolant temperature sensor (2) from the engine coolant thermostat housing (1).

1. Clean the sealing surfaces.

Caution: Refer to Fastener Caution in the Preface section.




2. Install the engine coolant temperature sensor (2) to the engine coolant thermostat housing (1) and tighten to 22 N·m (16 lb ft).
3. Connect the engine coolant temperature sensor electrical connector (3).
4. Clip the engine control module to the engine control module bracket.
5. Fill up coolant fluid. Refer to Cooling System Draining and Filling .
6. Close the bonnet.