Whaaaa? Doesn't matter what season, you need to have 50/50 distilled water and coolant. Period.
Heater probably isn't working due to air bubbles.
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Chad // 2001 BMW 740i M-Sport // 2000 BMW 540i Sport // 1997 BMW 328i Premium //
E38 16" Style 5 Basketweaves, M52 Parts, and New Gaskets/Seals for Sale!! PM for info. .
Originally Posted by SlimKlim
You're a derbanana