Quote:
Originally Posted by bleunetizen
Checked a few things today, during idle once the car is warmed up, the water temp stays at 105c in economy mode.
When I change the mode to sport plus, the fan kicks in and temperature drops to below 95c. Did not stay long enough to see how low it would get but it was obvious that the temperature is dropping so the car has some sort of water temp control.
I read from several posts saying that the ecu controls the thermostat electronically, but the stock thermostat do not seem to have any electronics in them except a temperature probe - according to what I can see from ECS Tunings website.
I wonder how the car controls the thermostat - surely the stock thermostat is not a 105c one if the car can drop the temperature to below 95c. Yet I am seeing 110c+ after a very short drive which is worrying. I wonder if it is considered safe in BMW"s books.
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I deduce then that the ECS 90 stat claims that it will keep the temp at 90 whatever the engine mode though with just a temp probe in it that's ECU controlled it would then have to have a spring blocker in it to allow more coolant through than stock.