The only reverse-rotation fan and water pump setups I'm aware of are on some serpentine belt systems where the fan and water pump turn opposite crankshaft rotation. All the fans on stovebolts turn clockwise when viewed from the front. Now- - - -trick question- - - -how do you explain the concept of "clockwise" to a kid whose only experience with telling time is by looking at a digital readout on his/her smart phone?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!