leaking cooliant on mondeo verona 1800 01 plate?

The later MK2 mondeos had a push fit sensor with an O ring rubber seal. The seal gives up after a lot of years and water leaks past it. It's worse at night when the engine is cold beacuse the plastic housing shrinks. To remove sensor, pull out the clip at the side then the sensor just pulls out. replace the O ring on the sensor or get a new sensor and push back in and lock with clip.

Dal
April 2011