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View Full Version : Elusive oil leak around turbo



crazexr7
06-02-2013, 06:07 PM
Car is a 99' AEB 1.8t with a k04-015 rebuilt about 2 years ago. It's leaking oil around the turbo area, the 2 feed lines on top were tightened but it seems to be coming from the bottom of the turbo. Oil pools up around the bottom intercooler piping. The intercooler piping was also taken off and there was a film of oil on the inside, I'm not sure if this is normal? I have not inspected the turbo for shaft play but, for a turbo that was rebuilt not that long ago, I don't see why it would be going so soon. Any input or ideas is greatly appreciated!

Here's the turbo and some sludge that gathered over time...

http://i1191.photobucket.com/albums/z470/Josh_Randall/IMG_20130602_100018_zpse78d755c.jpg (http://s1191.photobucket.com/user/Josh_Randall/media/IMG_20130602_100018_zpse78d755c.jpg.html)

Believer
06-02-2013, 06:16 PM
It's hard to see in there but could the oil return line be leaking?

crazexr7
06-02-2013, 07:15 PM
I'm going to have to take a look at it... Once I know where it is lol. If it was leaking out of there how would I fix it? Tighten it back up or is there a washer/ring/line itself that needs to be replaced?

Believer
06-02-2013, 07:46 PM
There is a metal gasket between the flange and the turbo surface. Either you aren't tight or your gasket is shot for whatever reason, if that's the source.

crazexr7
06-03-2013, 09:13 AM
There is a metal gasket between the flange and the turbo surface. Either you aren't tight or your gasket is shot for whatever reason, if that's the source.

Thanks I'll take a look. What about the oil in the intercooler piping. It was basically a film of it. Is that something to be concerned about?

Believer
06-03-2013, 09:17 AM
Thanks I'll take a look. What about the oil in the intercooler piping. It was basically a film of it. Is that something to be concerned about?

I definitely had some inside my intercooler piping. I would think it's normal because of the PCV, right? That system routes oil vapor into the intake correct? I could be misunderstanding the function of the PCV system though so don't quote me on that.

crazexr7
06-03-2013, 09:51 AM
I definitely had some inside my intercooler piping. I would think it's normal because of the PCV, right? That system routes oil vapor into the intake correct? I could be misunderstanding the function of the PCV system though so don't quote me on that.

Hmm ok that sounds right. I've looked it up a bit and it seems to be a normal thing, and it can also be fixed by use of a catch can. I'm mainly concerned as well because it was ran on dino oil for an unknown amount of mileage and time, until I changed it with synthetic...

crazexr7
07-15-2013, 01:11 PM
Ok so there is oil dripping from the return line. Is there only one gasket I have to replace or do I need another one besides this just one?

http://c1552172.r72.cf0.rackcdn.com/5871_x600.jpg

Believer
07-15-2013, 02:52 PM
That looks like the one for the return line to the pan. The one I bought that was for the return line/turbo connection was symetrical in shape. This is the one you want: http://www.ecstuning.com/Audi-B5_A4-Quattro-1.8T/Engine/Turbocharger/Oil_Lines/ES1590/

crazexr7
07-15-2013, 03:29 PM
^Thanks will be ordering that soon [az]

crazexr7
10-06-2013, 07:20 PM
Upon further inspection this is why it was leaking. Great mechanic this car used to have!

http://img.tapatalk.com/d/13/10/07/umy2udam.jpg

Yes that's the return line, missing it's top bolt.