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Old 08-17-2012, 02:15 PM   #10
xavi330i
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Join Date: Oct 2006
Location: Tampa, Florida
Posts: 2,959
My Ride: 2004 330i smg
If it the vanos, you can put your ear to the vanos area and hear the rattles. If this doesn't help find the source, more than likely its the bearings on the pulleys.
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