Oil in Intake tube, Oil trap clear

[ST 1]

All,

99 C70 with (T) engine 105k. Has a pretty impressive amount of oil in the air intake hose pre turbo and through the rest of the system into the engine. SO, following the great suggestions here I suspected and checked the oil trap and hoses. To my surprise the oil trap is clean, I can shine a light into any of the openings and see it through the remaining openings. none of the hoses or connections to the engine are clogged so Im not sure where to go from here.

So, I removed the air intake tube and the pcv hose for inspection to verify that the oil was entering into the intake at this point. Results of inspection are that oil is entering the system at this point.

Question is; it appears that the connection to the air intake seems really big, the hole is about 1/4" in diameter and you can see right into the air intake hose. Im not sure this is right?? I would think there wouldnt be such a large hole or some sort of screen, check valve or baffle there to limit the amount of vaccuum put into the pcv system.

The part Number listed on this connecting part is PA6-GF30, above that is 3900160878 and it has a wire connection to it. The wires dont appear to actuate any sort of valve mechanism, so Im thinking it might be missing some pieces that limit the amount of air getting sucked through the PCV system.

I've attached a picture or two to show you the part Im talking about.

Many thanks, Rich

[FCPEURO]

There is going to be oil in the intake hose because of the vapors from the engine that get routed into the intake by the PCV. The oil that you have looks normal to me.

[ST 1]

I would expect a film of oil, but this is pooling and dripping. To the point of leaking out. This would be very excessive oil leakage.

On my friends V40 there is a thin film of oil, nothing like this one.


Much appreciate the comment/feedback!!!!

THanks,

Rich

[ST 1]

Is there someone that could let me know what the sensor/connector is called, its function and if it looks complete? it looks like it is just a hole.

Im wondering if there is a part missing like a screen or check valve to limit the amount of vaccuum going into the PCV system.

Its really wierd that there is so much oil in the intake which is causing me to think that there is too much draw on the PCV system.

I have oil leaking/dripping from the intake manifold connection/piping.

Id expect a film of oil not dripping and pooling.

[mrcomanche]

Hi there


This is to reply ST1's original post. I have found why intake manifold flooded by oil!

Symptoms:
--------------
I had the same issue 2 weeks ago: turbo system has lots of oil in it, oil drops everywhere + I had rough idle run.

Tried...
----------
First I removed the throttle body and cleaned it with carb cleaner. I also cleaned the turbo tubes as they were swimming in oil.
I started the engine and it was kinda fine for 2 days. After I took it apart again I realized that turbo tubes are full of oil again, again oil drops everywhere.

Resolution:
--------------
OK, I removed couple of items:
- turbo hoses
- intercooler
- intake manifold
- injector system
- PCV system
- ALL tubes that connected to PCV oil trap

I have replaced the oil trap, even it looked OK. It wasn't cheap, NZ$115 in May, 2012. But you know... it's going to be fine for the next 70K. I have cleaned ALL the tubes that was connected to the PCV system or oil trap. Found lots of junk in there, but nothing absolute critical. And then... THEN... I've found the root cause.
I attached a picture, but not sure how long this website can host it, so I try to describe it as well. There is a pipe which is coming off from the PCV oil trap and connects to the intake manifold through a screw and a ring. I know how it sounds. This is actually a part. It's been welded to an iron pipe that is connected to the waterpump. So don't be confused, the water channel pipe is NOT connected to the oil system, but 1 oil channel part is welded to the oil channel. I hope you got it now...
So as you can see in the picture as well I put a nail through a hole where the gases normally gets through to the intake manifold. Well, this little channel was absolutely jammed, like concrete. It was actually 15 minutes to get through the hole!!! It wasn't cleaned for ages for sure.
Then I put everything back together and started the engine. It started like I stopped it 5 minutes ago. I tested it for a week, not oil leak, no problems with turbo, it is like NEW. IT IS FANTASTIC.

Explanation for symptoms:
------------------------------------
Engine produces gas during its work. It needs to go somewhere, otherwise pressure builds up in the engine and it damages seals, o rings, pushed oil out, etc.
This little pipe enables the gas to go the intake manifold. As it was blocked - like I said big time - pressure built up and pushed oil out - into the intake manifold through the system.

Some picture of the work.
https://plus.google.com/112837724388921646171/posts

[lebaowth]

Really intensely interested in this because I am seeing the same symptoms... I have tons of oil seeping out at the connection from the intake hose to the throttle body.

Can you do me a solid and give me a little better idea of the location of your clog. I see the part, obviously, from the picture, but I can't imagine your part in relation to the car. Not sure how to find it...

Thanks!

[wilmer77]

It is located under on the bottom edge of the intake manifold, front, left side. you can see the hose he mentions trailing back to the water pump

[abscate]

This is the standard , water warmed 1999- on PCV system. That orfice is susceptible to clogging on high mileage or long oil change interval cars

The PTC orfice cshown earlier is normal. It’s just a hole, heated by electricity via that connector to keep it from clogging. It’s a 50000 mile maintenance item.