Originally Posted by StephenVA (Post 1202742)

So you searched in the ARTICLES and the HOW TOS above and you didn't find anything at all? If yes then you are the first to say so.
I know this will come as a shock but people have been posting the info you are seeking for YEARS on this forum. You are not the first to discuss this system which in BMW language is called an "oil separator".
Try a little reading effort in a few How Tos articles and then post.

Not trying overly to smack you too hard but you are making way too easy.

Tip: all that mayo in your breather tube is causing your system not to function as designed.

Originally Posted by e7ats (Post 1203001)

Hey guys. I wanted to update on what I found. This hose in my hand did go to engine dipstick tube. I had a heck of a time blowing this hose out. Turned out to be some plastic like a decal stuck in it. Also the tube going right into the dipstick was plugged. I pulled out the entire dipstick tube and cleaned/freed up the tube.

I have it all back together and still fighting a lean condition on both banks. I replaced the vacuum hoses on the back side of the intake and at the valve on the front of the exhaust manifold. I also replaced the hose going to the firewall.