the missus frst as abit of a problem when you rev it the water in the header tank rises up to nearly the top of the tank?i`v put a new thermostat in but it`s still doing it.the temp gauge show normal temp when driving.any idea`s want could be wrong as it` driving me cracks cheers paul

 

Sound's ok to me as long as the car doesn't over heat it's ok i bet it was like tha before just you never noticed it before mine look's like it's going to explode

 

one thing to check would be the hose from the water pump isnt colapseing...rev the car up and watch the hose

 

thats normal to happen mate

 

try a new coolent cap mate

 

sounds like a bit of a air blockage but it will work its way out, as above, keep a eye on it and watch it dont over heat

 

thanks guy`s all sorted now new tank cap did the trick