well after going out and buying a couple of 10mm nuts to use in reinstalling my fuel rail all went well except one nut. It is stuck on. It wont tighten enough for the injector not to leak, and it wont come off. It just turns and wont make any progress in coming off. How do i get this nut off?
Thanks

 

drill it to pieces and get a new one

 

nut cracker