last Friday I drove from Plymouth to Eastbourne area. After 2 hours of stop start crawling the steam appeared. It seems to be coming from the expansion tank area. Topped up with water and the drive back on Sunday the temperature behaved itself but little traffic. I need to check the fan as I think it is not working and note the other thread about the relay, but not sure how to find out exavtly where I am losing the water from.

any advice gratefully received. cheers

Pete