[Galaxy1223]

I bought that Peugeut part and blocked the intake. Then I ran the engine without anything connected to the exhaust output tube and I felt like nothing is coming out of that? Could it be so that its "passive" in away that air is only moving when engine is sucking air. And if not connected nothing happens?

Anyway, that is just a theory that I decided to test by blocking also the output completely. In some engines this will lead into an engine error light when some air flow sensor detects too low flow. But in my case I have had no issues. I did this only few days ago so I have not driven that much yet.

Edit: I read more about what the PCV is about and realized that I should not block it. So the options seems to be routing to atmosphere or installing an oil catch can.