I spotted some loss of coolant the other day (also when cold), coming from the “thermostat housing” at the rear end of the engine (just under the coil pack). I could see cooling water between the coilpack and cooling housing (and on the floor under the car). This is the housing where the temperature sensor is attached and the water hose from top of the radiator fits. This housing is known for leaking on older versions of the engine (when fitted to Focus’ etc), from the O-ring around the temp sensor or the O-ring between the housing and engine block. The housing itself is also known to break internal.
All hoses on my Mog were tight fit, no leak there. With this in mind, I took of the housing yesterday, only to find that the O-ring around the temp sensor looks OK and the rubber gasket between the house and block also looked OK. The housing it self looks like an improvement from previous models, with another sealing to the block and 4 bolts (not 3 as earlier). I’ll try and find new O-ring and gasket today and refit it all, but before this – any ideas or suggestions what to look for?
Torstein
4/4 Sport 2009
1.6 Ford Sigma engine
