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Old 07-01-2012, 08:09 PM
LX-biker LX-biker is offline
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Location: Ontario, Canada
 
Join Date: Mar 2008
Posts: 611
Mein Auto: 2004 325XI Sport pkg
From what I know can be VANOS rattle, chain tensioner inside engine, or AC compressor belt tensioner pulley or/and tensioner (easiest to fix).
Not sure about AC clutch. Try to on /off AC an listen if it changes. USE different oil may calm down a bit VANOS rattle if it the case. Chain tensioner may diagnose very good mechanic I guess.

Last edited by LX-biker; 07-01-2012 at 08:28 PM.
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