Oil in my Airbox?
 

I have been working on my car a bunch lately. I noticed a decent amount of oil in my airbox and intake manifolds. I'm guessing you will all tell me that my AOS is going. Re assure me and tell me to replace it. Or am I missing something that would put oil in my intake system. The motor is a carrera 3.4 engine. :cheers:

No one? Really?

I wish I knew something to say about this. You would think some of the techno guys would chime in with suggestions. Maybe it is just a delay due to the holidays. Give it time. Good Luck.

Bill.

I'd say. White smoke at startup? Anything going on with idle? If oil is in your intake or your airbox or on your maf, then its probably coming from your aos.

I can't think of anything else other than AOS.
Also, I'm interested on input whether it's worth/recommended installing the "Motorsports" aos version for cars that hit the track several times a year.

I just ordered a new aos from pelican. I have no smoke but a new one can't hurt.

Did you get a new filter/oil your air filter recently? If its a NA engine (with only vacuum and full throttle being 0 in/hg), how would oil get into the air box form the AOS connection? Unless the carrera 3.4 AOS connects before the air box...

Those were my thoughts also. I have no idea.

My intake was full of oil, so much so that oil was leaking out of the intake tubes, completely filling the depressions on the top of the engine, and spilling out onto the ground. Replying with any ideas or experiences on what this could be is appreciated. I'm also changing the AOS as a shot at stopping the oil.

did you ordered aos for 2.5 or 3.4 ??
im in the same boat and thinking about this as well

I ordered it for the 3.4.

I definatly think I need an aos. I pulled my oil cap today while the car was running and the idle fluctuated until I put the cap back on.

The idle SHOULD fluctuate with the cap off, as you are introducing a vacuum leak, bad AOS or not. The thing with the oil cap is if it is unreasonably hard to remove because of increased vacuum, caused by the bad AOS


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Thanks epap. It was easy to take the cps off.

It seams (to me) all of the larger displacement engines have/end up with oil in the plenum.

FYI: there was no need to order the 3.4 AOS. Porsche just ran a water line to the 996 AOS to warm it up. Boxster has trouble getting heat out of the engine compartment.

I agree. It sounds like it could be the AOS. When my aos went bad I had oil in my intake manifold it also gave me 2 CEL codes though for lean air 02 sensors both banks. While in there I also found a small intake leak so I replaced my boots and replaced a missing screw that fell from the bottom of the resonace tubes butterfly valve. All has been good since. Pulled the intake last week to replace starter and there was hardly any oil in there at all. its been 8 months or so now since the aos replacement