The engine in my 1951 4400 is over heating. Sunday, I drove it to a car show which was only about 10 minutes away with no issue, at least that I noticed. After the show, I decided to fill the tank so I drove to a station about another 10 minutes down the road. As I pulled in the station, I noticed the temp gauge was at 212 when I shut the engine off. I filled the tank and started it hoping to cool it off with added air flow from driving and the temp did drop a bit by the time I got home, another 10 minute drive. When I got home, I checked under the hood and found the tops of the tubes in the radiator were dry and the metal support under the radiator wet so I knew I had boiled away coolant. This engine was recently pulled and all gaskets and seals replaced as well as having the radiator recored by a reputable shop. The mechanic had commented on how nice the insides of the motor were indicating that it was not necessary to rebuild. He did comment on crud in the water jacket but also washed it out with a pressure washer. So now I have to figure out what the problem is. Should I remove the thermostat? Could the water pump be an issue? The mechanic thinks we should mount an electric fan in front of the radiator but I'm not to keen on that idea. Any way to tell if the water jacket has blockage in it? Any other ideas on what might be wrong? It does start and run smoothly.
