my cooling system dosent seem to be quite right when the engines been running for 7 or 8 mile and stood for 20mins ticking over the top pipe on the rad on the right (o/side) is hot the top pipe on the other side is quite cool which I could probably understand if the car wasnt warmed up properly but the thing that has me thinking is the hot water in the expansion tank it dosent seem to me to be normal any ideas welcome