Turbo oil leak

[xargentum]

Hello, im having this problem, oil leaking thru turbo:


So here is the story: I bought T28, i was told that it was fresh rebuild, so i put that turbo on my ca18det and it started to leak oil like that(picture above). So i took it to our turbo rebuilders and they rebuilt it, it is like new. Buuut, i then i installed this turbo to my car oil leaking started again thru turbo :/

What to do? It is breathers problem?
Oil can't go to oil pan thru oil return line?

[float_6969]

Did you put a reducer in the oil feed line? It looks like it's over-oiling and blowing past the seal. Ball bearing turbo's don't need much oil.

[xargentum]

Its not ball bearing,simple t28 from s14.

[float_6969]

Still sounds like over oiling. Unless you've got an actual obstruction in the oil drain line.

[xargentum]

Still sounds like over oiling. Unless you've got an actual obstruction in the oil drain line.

I modified oil return, now its all downhill from turbo to oil pan but problem still is..turbo is leaking oil..

[float_6969]

You might try getting an oil reducer. You may have too much oil flow going into the turbo. What size line are you using for the oil feed?

[boost_boy]

If it's a standard T28, it has a built in restrictor on it. But nissan added another restrictor that's plumbed into the block and connected to the turbo via the hard oil line. IF you are still using the standard OEM components that came with the engine (oil restrictor on block and hard line), then your turbo was poorly rebuilt and needs to be rebuilt again. Hopefully, your previously modified return line didn't cause the seals of your freshly rebuilt t28 to let go because of excess pressure.

WTF: The pictures loaded after I posted this, but I see you have an after market feed line which could very well mean that your restrictor on the block may have been removed and that would definitely cause your over-oiling condition.

[xargentum]

In which place at engine block are that restrictor? At the engine block elbow which connects oil feed line? Because, i only changed oil feed line with braided, i left a elbow threaded in the engine block.

[boost_boy]

Yes

[xargentum]

Hmm, so i left that elbow, i only changed oil feed line to braided one, so the restrictor are in place?

Maybe for t28 you need bigger restrictor ?

[boost_boy]

If the elbow is there, the restrictor is built-in, so that means your turbo was poorly built or something with the turbo that needs to be serviced. I don't know how long ago it was that you got your turbo rebuilt, but sounds like warranty time.

[xargentum]

If the elbow is there, the restrictor is built-in, so that means your turbo was poorly built or something with the turbo that needs to be serviced. I don't know how long ago it was that you got your turbo rebuilt, but sounds like warranty time.

It was rebuilt one week ago, warranty is 6 months. So no other opinions? Bad rebuilt turbo?

[boost_boy]

Don't play with it, brother. It's bad, though I know that's not what you wanted to hear. I would disassemble and take it back to the shop that rebuilt it "ASAP".

[float_6969]

Yea, I assumed you had removed the stock "elbow" in the block as is commonly nessicary with braided lines. If you've still got that on there, then your oil feed should be fine. Which is either a bad turbo, or CRAZY high crankcase pressure.

How is your PCV system routed?

[xargentum]

How is your PCV system routed?

Stock, i only blocked "PCV" on intake manifold..

like this, only blocked "PCV Valve".


It is bad?

BTW i removed restrictor from breather which was in breather hose which goes to air filter hose, this one

[float_6969]

I would put it back to stock and see if the oiling problems continue.

Removing and blocking off the PCV valve isn't a great idea because the PCV valve helps reduce the pressure in the crankcase. Without it, the pressure is higher and could be blowing the oil in the turbo past the seals.

I would also put that restrictor back in as it helps to create a pressure differential so that the PCV valve is actually pulling from the crankcase and not just from the turbo inlet pipe.

[xargentum]

I would put it back to stock and see if the oiling problems continue.

Removing and blocking off the PCV valve isn't a great idea because the PCV valve helps reduce the pressure in the crankcase. Without it, the pressure is higher and could be blowing the oil in the turbo past the seals.

I would also put that restrictor back in as it helps to create a pressure differential so that the PCV valve is actually pulling from the crankcase and not just from the turbo inlet pipe.

I done this, now its stock PCV system, but still oil is leaking..

[float_6969]

Well you've covered everything. It has to be bad seals.

[mikecalder003]

I would put it back to stock and see if the oiling problems continue.

Removing and blocking off the PCV valve isn't a great idea because the PCV valve helps reduce the pressure in the crankcase. Without it, the pressure is higher and could be blowing the oil in the turbo past the seals.

I would also put that restrictor back in as it helps to create a pressure differential so that the PCV valve is actually pulling from the crankcase and not just from the turbo inlet pipe.

Do you know of restrictors similar to this in fuel lines? I am having an issue with mine and they need replacing, when I took them out I saw a restricor like this in the line and can't find any new lines with them in?

[float_6969]

Not aware of any restrictor in the fuel lines.

[boost_boy]

"NO" known restrictors in fuel lines.

[s13drifter88]

Why on earth would a fuel line have a restrictor?

[cbh148]

^fuel pressure regulator

duh

[boost_boy]

^fuel pressure regulator

duh

That's on the rail silly. And besides, he said fuel line restrictors and we all kow that shouldn't be in existence. I hope most folks here know what the regulator does

[s13drifter88]

Whats a regulator? lol

[float_6969]

I AM A REGULATOR!

[s13drifter88]

No youre not... youre a person lol