right iv got a 1984 defender 90 2.5 diesel and i was driving up to my dads house and the clutch was fine but when i came back out again got into it and put my foot on the clutch there was no pressure at all as if it wasnt working. so i checked the master cylinder and it had a crack in it, fitted a new one, bled it and no joy, then i discovered the problem that some people have with the clutch release arm so i took it apart to find that there was nothing wrong with it and everything was in the right place but the clutch wasnt working so i dont know whats wrong can anyone help as its really annoying me!!!!!!!!!!