Thanks for you work to put this together! My X5 with 167k has always used an excessive amount of oil therefore I plan to install your mod. What is the latest version that you would reccomend?

My 2004 325i with the m54 was ideling very rough. This ccv delete fixed it. I notice oil spots under the car now. Is that just what was in the ccv oil separator?

Ok, I've done this mod to 4, M54 engines now.
Latest one was my son's '03 325....he called me in a panic thinking he had blown a head gasket. Temps were around 14 degrees and all the mustard gunk in the original CCV system froze solid. Attachment 73109We let it thaw out when the temps got up to the 40s and now he doesn't have to worry. The only issue I have is with my '01, 530...seems there's oil leaking out of the tube which did go to the dipstick. I think I may have a bad oil stand gasket and the oil is running down from that. Again, thanks for starting this thread....

- Long-term Follow-up. My mod setup was in thread # 164.

- 10K miles later, zero oil consumption. Fantastic mod!

+1. Over 28000 miles. Running like new!

CN90, On your post #164, is there a step by step somewhere you can point me to? For example, I'm looking for details on the hose you're using to cap off the old ccv, what size is it and what mechanism did you use to secure it to the hoses going to the ccv?

- geobrick...I did this a long time ago, so I don't remember.

- When the weather gets warmer, I can check each and individual hoses and make a detailed list of items so people can get these things ahead of time for the job.

Thanks.

CCV Mod: can it help RMS leak?
 

- I have a 2004 X3 2.5i with very very minor RMS leak. Maybe one drop on the garage floor per night.

- In my previous posts, my theory as to how this CCV Mod works is that there is extra vacuum in the crankcase. In that case a bit of air is drawn in via the RMS.

- If this is the case, then the CCV Mod should reduce or eliminate the RMS leak?

- Has anyone here has a RMS leak and after doing the CCV Mod, the RMS leak goes away? Just curious...

found this mini cooper plugs,probably they fit the m54 intake.