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select · 09-09-2018, 08:00 PM

Hello Olive,

First.. the Oil lines are there for when the oil gets hot, it evaporates a bit. Normally you would just make it exit the engine for good or make it go into a canister (catch can) but because of regulations it is forbidden for any Oil to permanently exit the engine, so the engineers made it so the oil gasses get diverted into the induction airbox. So basically the engine is designed to inhale its own blow-by gasses.

So a bit of oily-ness inside the airbox is perfectly normal, however it shouldn't have puddles of oil in there.

In your case i think that some pipe going to the underside of the airbox must be leaking? I think a gunked up oil seperator is not the issue, but im no car mechanic, so take with a grain of salt.
It is however not very expensive to replace (around 100€) and should be done at around 100.000km anyway, imho.

I would disconnect the pipes you've mentioned and check whether they still are free. And if in doubt replace them.

09-09-2018, 08:00 PM	#6
select S5 - Full Throttle Join Date: Oct 2014 Location: Germany Posts: 475 Casino cash: $6813	Hello Olive, First.. the Oil lines are there for when the oil gets hot, it evaporates a bit. Normally you would just make it exit the engine for good or make it go into a canister (catch can) but because of regulations it is forbidden for any Oil to permanently exit the engine, so the engineers made it so the oil gasses get diverted into the induction airbox. So basically the engine is designed to inhale its own blow-by gasses. So a bit of oily-ness inside the airbox is perfectly normal, however it shouldn't have puddles of oil in there. In your case i think that some pipe going to the underside of the airbox must be leaking? I think a gunked up oil seperator is not the issue, but im no car mechanic, so take with a grain of salt. It is however not very expensive to replace (around 100€) and should be done at around 100.000km anyway, imho. I would disconnect the pipes you've mentioned and check whether they still are free. And if in doubt replace them. __________________ Greetings, Julian. Last edited by select; 09-09-2018 at 08:03 PM.