I have a 2007 Honda Odyssey touring model. Recently I had it serviced at the Honda dealership. In addition to my requested front end alignment and oil and filter change, they talked me into a radiator flush, fuel inj. service, air filter replacementsand battery service. I drove the car home after wards even filling up with gas before going home to Greeneville, TN. This drive was about 55 miles. I never noticed any problems. The next day, I left for Montghomery AL towing a trailer with a motorcycle trike on it. We stopped for lunch and continued on through Chattyanooga, TN into GA. The car suddenly started making a grinding noise from engine compartment and suddenly white smoke started coming out from the hood. I immediately pulled over and we got out of the car for fear of fire. This was the first time I had any indication of a problem. After a short time, I opened the hood to see what was wrong and noticed that the radiator cap was sitting upside down next to opening. I had the vechile towed to Chattanooga where I was told there was serious damage to the engine. I had them repair it (they were an AAA approved towing and repair shop). I also took pictures of the engine compartment. I went back to the dealership and asked to be reembursed for my expenses and the cost of repairs and the owner refused. He said he didn't believe they left the cap off and since he started out in the service department he didn't believe the car could even go that far without overheating. My question is: Is it possible for a 2007 Honda Odyssey to travel approximately 220 miles over two days before overheating and wrecking the engine if the radiator cap was left off and/or if no fluid was even added and the radiator cap was left off?