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      01-11-2013, 05:15 AM   #9
Mustard3
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Drives: F31 340i
Join Date: Sep 2011
Location: South England

iTrader: (1)

Mine makes a noise that closely matches your description, the difference being it occurs under gentle acceleration at low revs (not when dropping back to tickover) and more so when I'm applying a little steering.

I first noticed it after changing my EGR thermostat, a process where coolant got spilled over the pulleys / belts directly below.