E46Fanatics - View Single Post - Heater up to 80 deg + idling = Expansion Tank Failure??
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Old 12-06-2012, 12:53 PM   #5
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Join Date: Jun 2011
Location: Manalapan, NJ
Posts: 45
My Ride: 2001 330xi
Ok, so the mechanic did admit to me that he topped off the tank. I have searched and found nothing about expansion tanks leaking only because they are topped off. If they're not supposed to be topped off, what do you do with it?
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