So found out the side of the piston is missing on cylinder 6 and has also done slight damage to the bore. I will get some pictures later.
I can rebuild it myself I just need to get the maching costs quoted and go from there.
I did notice I couldnt find any of the missing pieces that have broken off the top of the piston, there isnt enough damage to the valves or cylinder for it to have been knocking around in the cylinder. there is no damage to the underside of the valves or head, the turbo looks ok and like nothing has gone through it.
Is it possible the old owner knew about it and removed the pieces or is it possible they could have melted?
Now I need to asses my options to either rebuild or get a second hand FPV f6 motor and drop it in and tune it up. Whats every ones thoughts