VERY difficult sometimes. If they don't come out easily they will be stuck fast, some even DON'T come out without head removal:mad: Even then it may have to go to a machinist for removal - forcibly:twisted:
Are you sure that isn't rusty water running out of one in those pics? It isn't unheard of for them to become corroded solid into the head if the head cracks adjacent to the injector and/ or glow plug.
Keep at it but be careful NOT to rotate the injector anticlockwise, it may well begin to unscrew the two halves then...:(
Penetrating oil and a rest overnight may help.
JC

