I removed the clutch fan on my C43 5 months ago and it has not caused any sort of problems or overheating at all.

In fact here in Sacramento, CA it has been 103-105 degrees the last few days and the water temp stays steady at 90 degrees C.

With the clutch fan removed you lose all that weight hanging off the water pump which must help preserve the water pump bearings and seals. And it does free up some Hp.

Jeff