Engine - Coolant Temperature Sensor/Switch: Service and Repair
Removing and installing coolant temperature sensorPreliminary work
1. Drain coolant completely.
2. Remove intake-air distributor.
Information
Component overview
Removing coolant temperature sensor
ATTENTION Danger of poisoning!
^ Coolant additives and cleaning liquids are toxic.
^ Swallowing coolant additives and cleaning liquids must be urgently avoided.
^ Do not consume any food or drink while working (danger of accidental mixing).
^ If swallowed, observe the warning information on the containers and contact a doctor. If necessary, show the doctor the warning information on the packaging.
ATTENTION Danger of scalding with hot coolant!
^ Never open the cooling system when it is hot. Emerging coolant may be very hot and can cause scalding.
^ The cooling system must be depressurized before being opened.
^ Allow engine to cool down.
1. Pull off cable plug of the coolant temperature sensor -arrow-.
Note: Even when the coolant has been completely drained, coolant emerges from the open bore on the coolant temperature sensor!
2. Unscrew the coolant temperature sensor using a ring wrench (a/f 22) -see picture-. 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. Tightening torque: 22 ft-lb.
2. Fit cable plug again -arrow-.
Subsequent work
1. Install intake-air distributor.
2. Fill up completely with coolant and bleed system.