How to check leaky shaft into Turbine

[MCH86GN]

With a turbo off the car, what's the best way to check shaft seal leak into turbine housing? I have the oil inlet blocked off and I was wondering if I put some oil in the turbo drain and stand the turbo up on the exhaust housing. If the seal is leaky, would there be oil in the turbine housing?

 

[bison]

It would leak because there's no positive seal


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[MCH86GN]

It would leak because there's no positive seal


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Well I pulled my TE44 off and I was tiring to figure out a way to see if it was leaking. It smoked around turbo and do. I'll see if Dave Roland can check it.

By positive pressure seal, do you mean once the car is running the exhaust gas creates positive pressure in the turbine housing on the shaft seal?

Thanks.

 

[bison]

By positive I mean that there's an actual scraping surface of the seal against the bore like a lip seal. It's just a piston ring. It has a gap. Even the gapless rings will not make a positive seal. Oil control is mostly by gravity and slinging of the oil away from the ring/bore area. The ring minimizes exhaust pressure leakage into the crank case and oil leakage into the exhaust but it can't seal any pressure build up 100%.


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[MCH86GN]

It would leak because there's no positive seal


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By positive I mean that there's an actual scraping surface of the seal against the bore like a lip seal. It's just a piston ring. It has a gap. Even the gapless rings will not make a positive seal. Oil control is mostly by gravity and slinging of the oil away from the ring/bore area. The ring minimizes exhaust pressure leakage into the crank case and oil leakage into the exhaust but it can't seal any pressure build up 100%.


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Thanks. The turbine wheel and the housing do have a little bit of on/in it. Is there a chemical solution to clean it off with or a way to clean the oil. I don't want to put anything on to damage any of the components.

 

[bison]

There's nothing much harsher than the heat and exhaust gases they are exposed to. You can rinse it off with solvent and store in a plastic bag


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