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      09-19-2012, 12:05 PM   #5
Juiced46
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Drives: 03 Turbo Cobra, 2011 335xi
Join Date: Jun 2010
Location: Wallingford CT

Posts: 1,023
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Bolts on the VANOS gears are known to back out and create some noise. However you would get some intermittent stalling as well. Are you still getting the misfire codes or just the noise. The n55 does have a distinct knock on cold starts that is normal also
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