water

evrytime i drive the car even for a little bit the  all the water comes out of the header tank checked the seal on the cap thats ok any ideas

hi mate,
you sure it's coming out of the header tank?
you could have a leak else where, like hoses, radiator.
A friend of mine had an annoying problem, he had some tiny holes in his hoses, fine and no signs of leaks etc, but couldn't understand why his coolant levels dropped all the time. Turns out that when the hoses got hot from the coolant the holes expanded enough to leak the water out.

thanks mate changed hoses and the cap seems ok now thank god