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Coolant dump
2013 X1 35i runs great for days, then will suddenly show low coolant followed by about a dump of about a gallon of coolant. Let it cool, refill and doesn’t lose a drop for days, then happens again. All looks dry on top, and 2 different mechanics (including 1 with 30+ years of Bimmer repairs) can’t find the cause. Pressure tested multiple times and it doesn’t lose a drop. The have found several small leaks and repaired them (at this point the don’t even charge me). Still, can’t really drive an otherwise great little car, since I never know when it will happen again.
Any ideas.
TK
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