2011 R56 S major squealing
#2
I'm wondering if that is a hissing sound we hear. If your valve cover is leaking, it could be allowing some sort of vacuum leak. What I recommend doing is a smoke test of the vehicle. If there is a vacuum leak somewhere it will pinpoint exactly where it's coming from. A local MINI independent shop can do this for you if you do not have a smoke tester. As you can see a smoke tester is not cheap: Pelican Parts - Redline Detection Smoke Pro Total Tech. Let me know what you find.
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themenace
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01-07-2009 12:25 PM