Turbo oil loss via air side - defect?

Hi,

I unfortunately discovered oil on the pressure side of my turbo during an oil change, specifically on the hose where the air is 'sucked' in, not on the actual pressure hose.

In addition, recently, when driving at full throttle, I've been hearing air noises coming from the engine, as if something on the pressure side is leaking.

For clarification, I've attached a few more pictures. It should be noted that I had already wiped off some oil while taking the pictures, in order to potentially see any oil leaks after a test drive. After a short test drive, however, no oil had been added.

What could that be? Could I be lucky and have everything be okay again just by replacing the pressure hose, or does this look more like an impending failure of the charger?

Best regards, Marc.

Well, it's hard to say anything about it from the outside. Remove the hose, check the play of the loader shaft. If it's okay, verschandeln everything, reattach the hose with a new clamp, and you're done.

If the hose is porous, it can almost be normal because some oil will always leak through, and as you can see now, it's leaking out!

How much play is acceptable in the wave? Or, how can I tell if something is not working correctly?

Hi Marc,

sticki wrote:

I unfortunately discovered oil on the pressure side of my turbo during an oil change, specifically on the hose where the air is "sucked" in, not on the actual pressure hose.

Am I wrong in saying that if oil is coming from the pressure hose of the charger, it's entering the suction side of the KGE (Kältemaschineneinheit)? Wouldn't a higher condensate gas pressure or poor oil separation be more likely causes here?

That's how I would assess it for my vehicle...

If I am wrong, ashes upon my head .

It's perfectly normal for some oil mist to come from the crankcase ventilation system. Even a perfectly functioning charger will always leak some oil.

How much play can the wave have? Or, how do I tell if something is not working correctly?


Radial play: The blades must not rub against the housing. I once saw a loader with about 1.5mm of radial play, and it still ran without any problems. It was a 1992 Astra with a 1.7-liter, 68 horsepower TD engine; keyword: oil pressure sensor.

Axial play: as little as possible - anything exceeding 0.1 mm would, in my opinion, be considered problematic.

Nebelwerfer_TDI wrote:

It is perfectly normal for some oil mist to come from the crankcase ventilation system. Even a perfectly functioning charger will always leak some oil.

Sure, I'll go, but I'm assuming that "sticki" is referring to a lot of oil, and isn't worried about a damp hose or a single drop.

I would like to know if my assumption about applying oil before and after using the charger is correct. That would help the person with the sticky situation for now, and depending on the amount, they would know whether and what they should exchange.

'Of course, right in front of the charging station - it's from KGE.'

If there were soooooo much oil, then the mechanic would notice it in the oil consumption, and in the extreme case, his engine would start running uncontrollably .

sticki wrote:

Hi, What could that be? Could I be lucky and have everything be okay again just by replacing the pressure hose, or does this look more like an impending failure of the charger?

So, if the pressure hose is leaking, be sure to repair it. The oil in your intake hose isn't coming from the turbocharger itself, but from the crankcase ventilation system (PCV). (@Nebelwerfer_TDI: thanks for the confirmation).

@everyone: Thanks for the help!
So, it's not that much oil, it was just a thin film on the hose and the loader... nothing dripping or leaking.

Okay, so now I just need to figure out where the air noise is coming from... I suspect it's coming from the flexible pipe, because the metal mesh on one side is already completely detached. *sighs*

Hi Marc,

sticki wrote:

So, it's not that much oil, it was just a thin film on the hose and the loader... nothing dripping or leaking. Okay, so now I just need to figure out where the air noise is coming from... I suspect it's coming from the flexible pipe, because the metal mesh on one side is already completely detached. *sighs*

Regarding the oil, it's normal and probably not worth mentioning.

Flexible pipe with metal mesh connected to the pressure side of the turbo? Now you're talking about the exhaust again, aren't you?

Flexible pipe with metal mesh connected to the pressure side of the turbo? Now you're talking about the exhaust again, aren't you?

Yes, I meant the flexible pipe in front of the catalytic converter.
'But that's actually a different topic, which has already been discussed here several times, so this thread is probably settled for now.'

Thank you to everyone who contributed!

Hi Marc,