Originally Posted by spud163

The Mondeo V6 is reknown for breaking the plastic impellar on the water pump, this could have gone, meaning the water will not circulate around the engine properly. Get the engine checked properly before running it again, the least that could happen is the headgasket going, with the worst being the engine being scrap due to warping. If it is the water pump get a metal one and change the thermostat at the same time, over heating tends to take them out as well. Saying all that though make sure it isn't just a broken auxillary belt as well, could be that simple, fingers crossed for you.