2nd Gen R56 Cooper S Most liked posts in thread: Vacuum leak

:cornut: 1st post, welcome to MA. Check the crank case to head hose and it's connection to the head for leaks 1st. Leaks from the valve cover usually involve oil not gas pressure leaks. The crank case generates both positive and negative pressure during the different phases of the running cycle.

Jason

 

:cornut: Your assumptions are correct. There is a plastic ring around where the nozzle connects to the head. There are 2 small serrated areas on the ring opposite each other. While pressing in on both serrated areas gently tease/wiggle the nozzle out of the head. I hope that this helps.

Jason

 

Unless someone was in there recently there is no reason that connector would come loose. My bet is the PCV, which is integral to the valve cover has failed, you'll need to replace the valve cover to fix the issue.

 

Thank you very much helped, for a long time I was looking for the answer to this question.

 

I recently had to do both the valve cover and the PVC. It wasn’t too bad. Got the parts from Detroit Tuned.