2004 A4 Cab B6 1.8T FWD
I am planning on giving this a whirl but not at his time - to many things going on.
I do have a question I would like to ask about how the vacuum system works and get some possible direction.

I had replaced valve cover gasket and made mistake of touching the breather tube - it disintegrated.
At that point, I believe, I started getting low oil light intermittently. I could drive 3 or 4 miles and it would flash a few times and quit - mile or 2 later it would flash again and stop. So, the last thing I did was the breather tube replace.

I read a blog that said if my engine was running and I couldn't remove my oil filler cap than there was a blockage.
I would presume that it would be on the oil filter side but not sure what to look for or what would be logical target.
Can anybody help? This is my daily and I'm afraid to drive it. Not a good thing!
Thanks