Hello, me and my friends are currently traveling in our 15 Passenger Club wagon with a pretty full trailer, and have encountered an overheating problem a little over an hour into our trip. Our temperature gauge was riding kind of high for awhile, as it is 88F here, but then proceeded to pass over the "normal" range into the red. We started smelling burning coolant so we pulled over to investigate. The van was smoking and the radiator fluid overflow tank was bubbling up and over and leaking coolant all over. We filled it back up with new fluid and let the van cool for a while. We're back on the road now and the temperature is rising back up already. Any ideas on the problem?