Looks like the thermo fan clutch is losing it on my '92 S-10, the fan spins pretty easily by hand. Engine temps (and AC) are rising, especially when idling in the summer heat. (Cooling system was flushed a few years ago, and engine temp quickly drops at highway speeds, so the thermostat is probably OK, and no leaks seen on water pump, coolant level not dropping, etc) I was in Autozone looking for a replacement clutch, they will need to order one. The guy at the counter said I would be better with a flex fan (which also needs a spacer added), but that is like double the price of replacing the clutch. He said the flex fan will give much better air flow then the stock fan with a clutch. Any opinions out there?