Well basically, it is something to do with the oil pressure at idle, I thought I had solved the problem by ajusting the oil return pipe work, it was ok for 1000 miles or so then started doing it again
It still does it now, it was a bran new core, literally within 5 miles of fitting it started to smoke, it only smokes if I leave it to idle for 5 mins plus, the turbo that it replaced did exactly the same also, even after a full new engine, it was still the same
Oil pressure at idle is between 15/20psi.
The only other thing I can think of is there is a difference in size between the oil feed and the oil feed adaptor to the turbo, I take my oil pressure reading from the same place as the standard oil pressure guage but using an aftermarket mechanical guage, so that's before the turbo oil feed adaptor, I can't help but think the adaptor having a narrower I.d is somehow affecting the oil pressure when the engine is idling.
Either way, I just ignore it now, turbo works perfectly has no play in the shaft, has been inspected, new complete engine, lol the works and it still does it!
No smoke........no poke!!