Cooked-ah!
Piston from that cylinder looks about the same. Top ring turned it's self into a 3 piece
All the bearings are pretty broken, even the cams were a little sore so I reckon it's run out of oil at some stage Or oil surge from before I got my new sump hurt it.
Head Gasket blew on pots 1,2,3 and 4.
So yeah, pretty good day in the workshop today, learnt lots and had fun. Massive thanks to Martin and Lloyd at Tas Mobile Mechanic for helping me pull the motor down.
Not sure what to do now, I'm thinking because I'm only aiming for 300rwkw, I should get a stock motor and just slap my rocker covers, plenum, sump and turbo on it and go rip some skids.
Another option is to get a turbo motor that needs a rebuild and get the good fruit from my motor and put it in that and make it all nice again.
I'm leaning more towards the first option, mostly because Nissan are a lot better at building motors than me and it'll get me back on the track a lot quicker. The only thing I'd be really worried about is oil control and oil pump, so I'll have to be nice to it and stay off the limiter