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      09-06-2019, 02:05 PM   #29
MrSweet1991's Avatar

Drives: BMW E90 330D M Sport
Join Date: Apr 2017
Location: West Midlands

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Originally Posted by Nadir Point View Post
My suspicion was rings, but not in that sense. I suspect crankcase pressure from blowby caused by worn rings is pushing oil out the CCV. And anywhere else it can go. Coolant? I can't grok that in this context unless the oil under consideration is milky with rods ready to start knocking.

Does the CCV on that go thru the turbo like the 335?
Ahh I see what you mean, well having removed the CCV Filter the crankcase pressure has reduced massively. I loosened the oil cap in the morning and then started the car and the CC pressure is pretty much no different to when the engine is hot and been through some WOT pulls which can be seen here

And yes CCV works the same as 335D it's the same engine just single turbo US CCV may be different though