hi been having probs with the water in my disco 300tdi,1st prob i didnt think it had antifreeze so i drained it and filled it.2 weeks later it chucked out the water from expansion tank.i fitted a new cap and tried to bleed it.turns out the little pipes from bottom of expasion tank and thermostat where blocked solid,so i thought i had fixed it and put more antifreeze in.then it starts looseing water about 3ltr,i read on hear about the p gasket so had a look.it looked a bit brown around that area but that could of been there ages so i spray painted that part black and checked it again after a few days and it looked black still.i topped it up again a few days later.checked it again last night and its fine in expansion tank but if i squeece the top hose it feels empty.i dont realy want to keep buying antifreeze if its got a major prob so any ideas.cheers