Ok thanks i will try this when i fill it up, i went to another parts place to get another thermostat to check it wasnt that and the guy there said every time hes seen this happen the water pumps been buggerd which would make sense so im pulling that off and replacing it to he said just check it but i thought i may aswel replace it while im thereYou need to open the bleed bolt on the stat housing when filling the system. once coolant starts to run out with no air in it close this off and continue to fill the system until it is full which is
something like 5 liters . The manual gives you a diagram and shows you where to put a paper clip under a part of the rad cap then put it on. Run up to temp then let cool refill as necessary. I've done this a few times and it worked fine. Manual helps for the paper clip carry on as i not going to try to explain it or why you do this........