Oil-Contaminated Turbocharger Hoses

Hello,

I can't complain about any loss of power or excessive smoke or anything like that right now. I just noticed that the oil line from the turbo to the intercooler and back is quite oily. I thought, if it looks like this on the outside, what must it look like on the inside?
"Does anyone have any experience with that? My TDI has about 240,000 km on it, and it's definitely never had anything like that done before."
Should I start a process to drain all the fluids, clean the lines, clean the cooling system, and possibly clean the intake manifold?
And, since I think the pressure lines are generally okay, can I explicitly seal the hoses at the connections with any kind of sealant?

And also, the AGR valve has been defective for 30,000 kilometers.

As long as nothing is coming out the other end, cleaning the pipes and LLK (likely referring to a specific system or component) won't make any difference.
The system cleans itself automatically because the entire refractory material is flushed through with approximately 1 bar of pressure.
It's possible that the turbo won't last much longer. But let's wait and see how the oil consumption behaves.

faz wrote:

I've noticed, quite extremely, that the oil line from the turbo to the intercooler and back is quite oily.

"My AMF Lupo looks pretty terrible too, exactly in that area of the drain pipe, which has that bend at the bottom. It's all oily, and dirt has accumulated on the oil there. I noticed it during my last air filter change. My mechanic said it wasn't a big deal, but it made me a little uneasy."

I thought, if it looks like this on the outside, what must it look like on the inside.

Are you saying that the outside of your pipes is completely covered in oil? That's not normal. While the pressure pipes are oily on the inside, if they are sealed properly (which they should be!), then there shouldn't be any oil on the outside.

If it's coming from the outside, I would start looking for the leak. Replacing all the hose clamps with more secure, screw-type clamps could help prevent this and doesn't cost a fortune.

Regards,
Private.

Yes, they are quite dirty on the outside.
Okay, so, if I decide to check the lines, what should I do if I actually find a, well, a small leak? (otherwise, I would definitely notice it in the vehicle's performance).
Could I possibly "tape" them with duct tape? New tubes cost a lot of money, and as a student, I'm already thinking about alternatives...
Okay, I understand that the pressure hoses are now 11 years old, so they are probably starting to become porous. I thought I could improve them by using duct tape, sealing strips on the connections, and new, more stable hose clamps.
Or is it a hopeless case?

I'd say:
'Trial and error'...

However, if you actually find a hose that has a hole, I would replace it. Hoses shouldn't be that hard to find, and you should be able to get them cheaply, for example, from Schrotti or eBay. I might contact sellers on eBay who are selling multiple parts of an engine, as many of them probably won't include the hoses. Or, you can put something in the search bar here. Since you've been using it for a long time, it doesn't have to be done in a single day.
On the other hand, I wouldn't wait forever. The more charge air that escapes, the higher the turbo spins, and the sooner it will fail...

I also have some LL hoses from a Golf 3 lying around, but I'm not sure if they'll fit. If they do, you can have them.

Regards,
Private.

I will take care of it as soon as possible.

I just checked, and the hoses from the Golf III don't fit. It seems they have a different hose routing. Well, the engine in the Audi is also mounted longitudinally.