Well I think I haver partially determined why my turbo leaked oil through the rear seal like a ****.

Oil pressure...
Did you know that on Hitachi's we have an internal restrictor pill????? YUP!

Well the turbo guys had to remove it and destrioyed it in the process. They said that usually they don't have a problem leaving it out.

So I bought some 3AN hose and adapters to mate to the stock setup!





Pic of my oil inlet lines and my Oil return line.

 

This should reduce the oil going into the turbo enough to stop the oil leak it was most likely causing.

I am also going to check out my crank case system since they said blowby pressure can also contribute to the problem.

:edit: Oh yeah the oil inlet in 3AN sizing costs about 14bux because I got a premade length hose That's why it's longer.

 

Hey whered you get all that stuff digi? I wanna replace my bent water and oil lines on my turbo with nice new shinny ones like that.

 

ditto. already got the blingin oil cooler lines.

 

Local hotrod speed shop called Lopers here.

They have a whole wall of AN fittings and lines.

The adapter flanges were from my turbo guys.
www.turbosdirect.com

For my Oil inlket line I used some Silicone housed coolant line I got from them. I know this stuff won't go bad due to pressure or heat!

 

this is one of those things that should get archived for future reference, and or should be continued for a nice how to. Even if it's just the proper part sizes.

thanks and have a nice day.

 

That explains why the turbo is leaking?

 

Arent only special kinds of silicone lines supposed to be used for coolant and/or oil?

 

i was thinking the same thing.

i was wondering if you can get more flanges made up for me? i can get the AN line and fittings, i just want the flanges with appropriate bungs welded to them.

on the top of the front housing, what size are those threads for the oil supply line banjo bolt? 12mm or something?

 

ok some minor changes for those wanting to do this

You will be much happier with a 90 or 45degree bedn at the turbo!

Mine barely fits around the ACV area.

Also It does explain the turbo leak problem a bit.
Since the internal restrictor pill was removed it was pushing too much oil through the turbo.

The other thing which I will test is the Crankcase system. I need to make sure nothing is kinked and preventing the thing from venting.

The rear seal is not a ull seal on turbo's.

It is a semi seal which can be over run if too much oil is in it with no where to go.

The compressor side has a carbon seal which is less prone to leaking.

The turbo guys took it apart in front of me and checked everything.

 

i want to at least do my oil return line in SS. get me those flanges. oh, and i have a few feet of 10AN line left, so i figure i can use that.