Smaller NAS 110 water pump pulley - Defender Source
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  #1  
Old July 11th, 2014, 09:07 PM
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Matthias Moran
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Smaller NAS 110 water pump pulley

I just got back from a trip where I towed about 6000Lbs of trailer over the mountains in over 100 degree temperatures. Perhaps not surprisingly, overheating was a bit of a problem.

I've done nearly everything that I can think of to keep it cool including installing a thicker core radiator. I'm thinking that a smaller water pump pulley might help by running the water pump and cooling fan faster. Does anyone know anything about this and where might I be able to source a smaller pulley ?
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Old July 11th, 2014, 09:33 PM
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Doug Crowther
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What about putting the a/c condensor fan on a switch that would allow you to turn on a pusher fan when needed ?
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Old July 12th, 2014, 02:51 AM
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Matthias Moran
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Quote:
Originally Posted by Uncle Douglas View Post
What about putting the a/c condensor fan on a switch that would allow you to turn on a pusher fan when needed ?
Good idea except that in that kind of heat, the a/c is on anyway and even if it wasn't, there's a coolant temperature sensor in a NAS 110 which turns the a/c fans on when the coolant temp rises and mine is working (I checked.)

Also, I believe that even large electric fans (I upgraded mine) are relatively ineffective compared to a viscous coupling fan.
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