Quote:
Originally Posted by tc535i
Wtf
Cooling system is sealed, under very high pressure when it's hot. There is absolutely nowhere for coolant to evaporate, that makes zero sense. If coolant is escaping, you have a leak somewhere. Period.
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Per BMW mechanics, this is normal.
I top mine off about once every 16 months as the light comes on.
I have no leaks that I have been able to see.