[PacoJones]

Basically, it will likely be OK as long as the car keeps moving. But if you do sustained high speed, like on the motorway, then hit traffic and come to a stop, the car will probably overheat. Ask me how I know.

Follow Kevin's advice, or get the local mechanic to rig up a switch and some wire that powers at least one fan directly that you can turn on from inside the car should you need it.

In the absence of the above, I'd do the trip late at night when the air is cold and the roads are clear, keep to a gentle cruise in top gear at under 2500 rpm so that it stays off boost and cover the last few miles with the revs as low as possible so the engine is as cool as possible when you stop. And in the last several miles, crank the heater to full and the blowers to max with the windows down to dump as much heat as you can before stopping.

But it's a risk. A tow is much cheaper than a new engine.