Thread: HELP! Hissing Engine Sound (2008 328i)
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      12-08-2012, 09:17 AM   #3
Darius
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Drives: E90
Join Date: Apr 2009
Location: Lithuania

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What about alternator belt tensioner or pulley? Or it's not the exact sound but maybe it's just comming- loose drive chain? It might just need tensioners to be adjusted.
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