Quote: Can you turn the clutch fan by hand with the engine hot? There should be ALOT of resistance.
This is a very real possibilty, it happened to me. New fan clutch and it was back to normal.
Good luck with it.
I'm betting it a at least a couple factors, not just one.
I've seen a bad fan clutch cause overheating before too, so that's another possibility. A guy came into my Dad's gas station with a Chrysler that was overheating. The fan was barely turning while the engine was running.