Crankcase pressure, turbos leaking oil

[98roush]

Figured I’d start a new thread since this doesn’t relate to my previous one

History of previous issues with it.

https://xoutpost.com/bmw-sav-forums/...aptations.html

2010 X5 xDrive35d

So I had a intercooler completely FULL of oil. I’ve pulled off both charge hoses and started the car to find that the crankcase is Being severely pressurized and oil is heavily flowing out of the turbo outlet.

I’m aware there is a valve cover gasket that can cause issues but that is only affected by boost pressure correct?

It is possible I have a pretty oily DPF causing high exhaust pressure is there something that could cause it to back up exhaust gases into the crankcase?