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      11-14-2010, 04:10 PM   #64
First Lieutenant
mrad01's Avatar
New Zealand

Drives: 2008 BMW E90 M3
Join Date: Sep 2007
Location: New Zealand

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Originally Posted by andrew270681 View Post
Im curious to see what it is. My car does the same thing! Just happens for a second then goes away.

My stealership told me its normal everyone here says its not..

Im very curious to see if it is the check valve on the vanos. Makes sense.
VANOS rattle on cold startup is normal - it is the metallic knocking noise which occurs just after the rattle which is the problem here. Have a close listen to the video on the first page of this thread.
2008 BMW e90 M3 6MT

1990 BMW e30 325i 5MT