Leaking Connection to Injector on Prima M50

[Wayward]

I recently replaced the injectors on my Perkins Prima M50. I now have a very small fuel leak from the connection between the high pressure pipe and the top of the injector.

Tightening the nut holding the pipe to the injector some more does not seem to be an option. The nut tightens just so far, and then won't move further.

Is there any easy fix to this, or do I need to replace the high pressure pipe? New pipes are about £50.

[never monday]

it's possible the flare is partially collapsed. Best way to fix it is replace the fuel pipe.