The turbo on appears to be off eiter a Skyline or 240Z. It has dual ball bearings. There are 2 sets with 8 ***** each and looks to be in pristine condition. The only issue is it leaks oil. Because it is leaking out both ends and is returning a tremdous amount of oil I suspect it is just see too much oil pressure. No one seems to know what the correct restrictor size should be or what the correct oil pressure should be. Any assistance would be appreciated.

 

most nissan t28s come with a banjo bolt and that is the restrictor but most aplications take a .6 or .65inch restrictor

 

How do you know its not the seals?

 

I used a .065" restrictor. It did seems to work.

 

When I started to disassmble the turbo I expected to see a T3. So, the face plate kinda confused me. The only thing holding it in was a thin film of oil and the tight tolerance. I did some surfing and couldn't find a good way to remove it. I saw a couple of posts where people used the bigger hammer approach. So, I considered it for a day or two and came up with a easy and non destructive way. I put the turbine shaft back in, plugged return oil line hole, turned the compressor to 150psi. When you apply compssed air to the oil supply opening the face plate pops off without damage. So, what does that have to do with seals? Well, the seals on the face plate held the high pressure air. So, they couldn't leak oil at much lower pressure. The only seal on the turbine side is a ring on the shaft. It is in perfect condition and so is the brass on the housing side.