Thread: Cold Start Engine Knock / Rattle
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      10-19-2012, 03:41 PM   #144
M3PO
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Quote:
Originally Posted by Mike Benvo View Post
I've asked technicians about this before and they claim that it's normal and the vanos pressurizing.
IIRC, there are check valves that are supposed to keep the VANOS pressurized.
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