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

Removing and installing coolant temperature sensor
Removing coolant temperature sensor

Note: Observe the general work instructions when working on the cooling system.

Caution: Danger of scalding! Coolant can be extremely hot and pressurized. Wear suitable protective clothing. Carefully open the cap on the expansion tank.





1. Drain coolant completely.
2. Remove intake distributor.





3. Pull off cable plug of the coolant temperature sensor.

Note: Even when the coolant has been completely drained, coolant emerges from the open bore on the coolant temperature sensor!





4. Unscrew the coolant temperature sensor using a ring wrench (a/f 22). Absorb emerging coolant.

Installing coolant temperature sensor





1. Clean sealing surfaces and screw in coolant temperature sensor with a new sealing ring into the distributor pipe with a tightening torque of 30 Nm (22 ft. lbs.).





2. Fit cable plug again.
3. Install intake distributor.
4. Fill up completely with coolant and bleed cooling system.