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      04-15-2019, 08:49 AM   #8
tomwadek
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Drives: 2011 BMW 335i
Join Date: Oct 2015
Location: ca, USA

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Updated

I have chased the sound and it's coming from the general location of the OFHG and belt tensioner. It almost sounds like a vacuum leak when I rev the motor up but then goes away above 1500 RPMs.

As far as the leak goes, I cant find where it's coming from. Sometime sit leaks and sometimes it doesn't. Only thing that I can think of is a cracked radiator.
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