Ding ding ding ding ding ding!!!

Sure sign of a failed fan clutch. It's pretty easy: when the engine is hot, the fan blades should be hard to turn by hand (locks up and turns the same speed as a running engine, roughly). When the engine is cold, the fan blades should spin very easily (letting the engine warm up to operating temperature easily).

Obviously, you should check these while the engine is OFF and the fan blades ARE NOT SPINNING. Ask me how I know this.

The fan clutch itself is something like $80 or so. Get one with a lifetime warranty. For some reason, I had three go out in as many years. Every year, right before Moab in May, I'd be in there unbolting those four 10mm bolts...

HTH,
mike