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Old 01-02-2013, 07:08 AM
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doru doru is offline
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Location: Calgary
 
Join Date: Sep 2007
Posts: 4,702
Mein Auto: 2003 530iA
Maybe a plastic part is not seated properly, or has deformed in time, and in cold weather it's somehow contracted, creating an unwanted "vortex' where 2 pieces should mate, and now they're leaking?

Try to open the hood and double check both boots that go from the cabin filter into the firewall. I know one boot on my car lost one of the claws (embrittlement), and on another occasion, the other one wasn't mounted properly fogging up the passenger window every time I was in a car wash. Nobody could figure out the problem. Made also a weird sound.


Part #7 in this pic:

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Last edited by doru; 01-02-2013 at 07:10 AM.
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