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      02-06-2013, 06:18 AM   #2
nicktyler
Major
United Kingdom
23

 
Drives: 335i (sadly gone)
Join Date: Jan 2012
Location: Essex


Posts: 1,175
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This sounds like the dreaded wastegate rattle. There is lots of info on this if you do a quick search.

On the other hand it might just be a loose heat shield.