If I look at the bearing core there are two oilpassages, one top and one bottom.

One is a non-threaded larger hole with flange that you can bolt an oilline to, the other is a threaded hole sans flange wich (if you look inside) had only a small hole inside.

Am I right in assuming the threaded hole with the small hole inside is the oilfeed and the larger non-threaded hole the drain?

need to know for sure because I need to rotate the lot and refit...

Thanks!

 

That sounds right

 

Yes you are correct, on every turbo I can think of that I have used the "in" is threaded so it can seal as its under pressure, the return is often just a flat flange as its not under significant pressure.