I had this problem on my rangie after I did the head gaskets. I just ran it, got it warm, then added coolant if possible, then romped on it to move the coolant around the engine, it took a couple of tries and bleeding using all the ports, but it is fine now. I would be careful about it getting so hot though, I am not sure my truck has limp home mode, but it doesn't sound good to be getting it to that point.
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