What could be spitting oil behind throttle housing to intake distribut

[Domiac]

My engine room is pretty clean apart from the fact that either the famous IMS or RMS is dropping few drops of oil. Not much, never seen drops of oil on my garage, but it begins to be noticeable after engine cleanup if I drive around 500 miles or so. Engine drop along clutch + RMS / IMS work etc. will follow a few months later..

Today I noticed a considerable amount of dirty stuff which rests way behind the intake air housing, right next to the throttle housing. Actually it is behind the throttle housing on front intake distributor (both on the left side and on the right side), especially the clamps there have accumulated plenty of dirt.

Any ideas what's the cause? 2004 Carrera 4, 85k, oil consumption is good, car runs great and Durametric is happy too.

Thanks in advance, people in these forums are simply amazing, so much information and passion!!

PS. First post done, not a virgin anymore :thumbup:

Edited November 19, 2013 by Domiac

[Uwon]

When did you last change the AOS, which located in behind the throttle body? Do a search here and you'll find lots of info.

[Ahsai]

Mine is similar and I suspect it's sweating from the o-ring inside the push ring connector at the top left corner of your 1st photo.You can just squeeze the top and the bottom of that ring and pull straight to the left to disengage the hose. You will find an o-ring inside the connector. I planned to change mine but didn't have a chance yet.

[Y2K911]

What is it sweating, Ahsai? Oil vapor?

I believe this hose connects at the other end to the AOS, right?

[Ahsai]

What is it sweating, Ahsai? Oil vapor?

I believe this hose connects at the other end to the AOS, right?

Yes and yes.

[Y2K911]

Thank you, Ahsai!

Martin

[Ahsai]

Thank you, Ahsai!

Martin

Np. It's just a theory for now since I have not replaced mine and verify. However, I don't see where else would the oil/oil vapor come from in that area. Let us know how it works out. I should replace mine soon.

[Domiac]

I suspect the same, disconnected the air hose connection to the oil separator, noticed I has some slack and the connection does not seem to secure tightly. The connection from AOS to TB had a small pool of oil. I cleaned up the surroundings, took throttle body away and cleaned some more. Now that it is clean, I'll drive now some more and hope to see where the leak is coming from. The adapter / rubber sleeves behind throttle body looked very clean, it had only a small amount of oil there.

Mine is similar and I suspect it's sweating from the o-ring inside the push ring connector at the top left corner of your 1st photo.You can just squeeze the top and the bottom of that ring and pull straight to the left to disengage the hose. You will find an o-ring inside the connector. I planned to change mine but didn't have a chance yet.

[Domiac]

Ahsai, FYI, the part number for that o-ring is 999-707-154-40-M127, it goes to 996-107-047-51-M100.