It's always something, huh? The E350 is running warmer than usual suddenly today. I stupidly didn't move the electrical temp gauge from the F250 so I'm going by the dummy gauge. It is climbing up about half way at highway speeds. The fan shouldn't be very easy to turn by hand when its at 200F+ or does it always have some give? The fan is turning but if maybe its slow, its possible. If i let off the throttle for a couple minutes, it drops quite a ways. The radiator is full so it's not that. So... fan clutch? Or worse, failing water pump?