WTB Cooling Fan for 3.9 V8 - Defender Source
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  #1  
Old June 25th, 2015, 12:08 PM
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WTB Cooling Fan for 3.9 V8

To my understanding, not all 3.9's turn the same direction. I have a 3.9 whose threads on the front of the water pump (where the fan spins on) indicate that the fan tightens on the threads in the counterclockwise direction, as viewed from the front bumper, and thus the engine and fan turn clockwise when running. I have a fan from a Disco that doesnt turn that direction. I have been scratching my head about this for some time now. Legend has it that Land Rover, in their infinite wisdom, changed the crank rotation direction of the 3.9 at some point. Is this correct?

In other words, I require a fan that threads on the water pump counterclockwise, and spins clockwise when running. Anyone have one?

TIA,
Kent
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  #2  
Old June 25th, 2015, 12:30 PM
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Turn the engine on, check which way the fan turns and turn in the same way to unscrew

I'm assuming you have a v-belt engine, right?
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Old June 25th, 2015, 12:34 PM
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Quote:
Originally Posted by rijosho View Post
Turn the engine on, check which way the fan turns and turn in the same way to unscrew

I'm assuming you have a v-belt engine, right?
Yes, v-belt. I don't have a fan to unscrew though. I need one.

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Not sure if you can see the threads in that pic. Engine turns clockwise, as looking from the front of the truck.
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  #4  
Old June 25th, 2015, 08:16 PM
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The engines turn the same direction, it's just the water pump/fan that is standard or reverse rotation depending on if it's a V-belt or Serpentine belt engine. V-belt engines are reverse thread on the fan clutch where it screws onto the water pump. I have several V-belt fans with clutches available.
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  #5  
Old June 28th, 2015, 08:35 AM
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I have one if you still need a fan.
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  #6  
Old June 28th, 2015, 09:41 AM
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Do you want to go electric?
I have a dual Flexalite setup--26"x15"; it was on a RRC.


.
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Old June 28th, 2015, 11:18 AM
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Found a fan/clutch from an RRC. I'll see if it works when it arrives this week. If it doesnt, I just might go electric.
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