Guys, what is the proper way to bleed a diesel fuel system??? Air was getting in from somewhere and I think after four days of searching, have now found and hopfully fixed the leaks (a dogey connection to one of the filters and found a crack in a injector return line. Problem now is that no matter how hard I try, I cannot bleed all the air from the system (unless there is another leak, grrrrrrrr).

If I'm still getting air in, apart from replacing all the fuel lines including the returns, I'm buggered if I know where it is coming from.