HELP! Hissing Engine Sound (2008 328i)
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12-08-2012, 09:47 PM
Drives: Alpine White 328i Sport Pkg
Join Date: Sep 2011
Originally Posted by
Loosen the oil cap with the engine running-don't open it all the way just loosen it and crack it open a hair-see if the noise changes.
Ok, Ill try this. What would it mean if the noise does change?
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