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A Dodge RAM van my wife has is overheating. And before I go about changing more parts I decided to ask here, even tho it's supposed to be BMW only :)
I changed the termostat as it always just built up heat and we have to stop and let it cool down. But that didn't help the problem at all. Before this it had run a bit dry and had a lot of rust in it. Someone said it could be the radiator is clogged. But I am wondering if it could be the waterpump? Or even a clog in the engine itself?
It never heats up driving around the city (can do it for an hour or more without problem).
I took it for a highway trip yesterday. If I keep it under 55mph it stays fine, but overheats slowly if I do 60mph or more. It don't seem to cool down unless you go really slow again (40 or less).
Whats you best guess? Should I replace the radiator?