Renault master - valve + piston problem

[julesgemini]

I recently got a van it was smoking I took the cylinder head off to discover a hole in one of the exhaust valves damage to an injector and a small chip in one of the pistons. The barrel doesnt seem scored though. If I change the valve and the injector what are the changes of the piston chipping more ? or any other problems ? apparently it happened because the previous owner put petrol in instead of diesel.

[pigpen]

tell your van to pack in the fags, they're bad for it. if it's a white van it's probably shagged anyway. dump it in a canal. should also stop the smoking.

[julesgemini]

I was hoping for somthing a bit more helpful !