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Old 10-04-2012, 01:20 PM   #16
jdstrickland
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Join Date: Apr 2010
Location: Murrieta, CA
Posts: 6,723
My Ride: '94 325iC & '00 323i
I replaced a duct that had a huge hole in it, and the alternator was good for a long time when the hole was there.

Obviously it helps keep the alternator cool, but it is not a fatal event for the duct to be missing or have a hole in it.
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