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JerryM
Dodge Dakota
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7/26/2009
14:52:22
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 Subject: cooling fan
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Message:
Have read a few posts about removing the mechanical engine fan and just going with the electric for cooling.
Has anyone done this, and how much MPG increase might you see after taking the fan off. Also is there a possibility of the engine overheating or running hotter? The electric fan is much smaller in size.
Thanks and stay cool today!
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02dak4.7
Dodge Dakota
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7/27/2009
15:01:40
|  RE: cooling fan
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Message:
I am curious about this as well. I cannot figure out why there are two cooling fans, yes I know the electric is there as a fail safe and to make up for the extra heat for the a/c. But why the mechanical? Why not just lower the temp the cooling fan comes on to a more reasonable level?
Either way, does anybody know if it is possible to lower the temperature the fan comes on at?
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daddio
Dodge Dakota
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7/27/2009
15:08:41
| RE: cooling fan
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Message:
I've been running my '00 QC 3.9 w/ 5spd for about 5 yrs without the mechanical fan and clutch. Never has overheated and I live in the deep south about 20 miles from the Gulf of Mexico.
02dak, you can buy an adjustable thermo-switch and wire into the stock fan to change the temp it comes on at. The stock fan is set to come on for 2 reasons:
1) Demand for A/C and engine temp above 130degF.
2) Engine temp @ 210degF.
As I stated, mine has been fine for the last 5 yrs.
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jjj
Dodge Dakota
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8/01/2009
09:57:04
| RE: cooling fan
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The electric fan is the MAIN fan, the mechanical is the backup fan from the factory.
ON vehicles that came stock with both, there is about a 1-1.5 mpg gain on the highway with the mech. fan removed. Not quite as much in town.
ON vehicles that came with mech. fan only, going electric only is a 2 mpg gain across the board.
I have been using my 2001 5.9 since 2001 (basically day one) with the mech. fan removed. Never overheats and only runs a little warm (rarely) when sitting still for extended periods in high 90's with high humidity with the air on - never goes out of normal range.
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