Modified XJ Cherokee Tech XJ (84-01)
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Heavy duty cooling fans

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Old May 23, 2011 | 03:42 PM
  #16  
freegdr's Avatar
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Originally Posted by alpine.adrenaline
The little thermostatic switch they send you has simple instructions with it. It's adjustable, uses a sufficient relay, and is color coded. I went a different route and wired each fan independently so they come on at increment temps, but don't tell ffdynamics because it'll void my warranty (shhh).
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Old May 30, 2011 | 07:07 PM
  #17  
84supersport's Avatar
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From: Louisville KY
Year: 1996
Model: Cherokee
Engine: 4.0L HO I6
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How are those triple threat fans wired to function out of the box?
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Old May 30, 2011 | 07:22 PM
  #18  
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From: Phelan, CA
Year: 1991
Model: Cherokee
Engine: 4.0L
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I have a 91 XJ 4.0L and after completely revamping my cooling system I can cruise at 70 on a 100 deg day and my dual electric fans will never coms on.
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Old May 31, 2011 | 02:37 PM
  #19  
TheJerm's Avatar
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From: Flint/Asheville
Year: 1995
Model: Cherokee
Engine: 4.0 HO
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Originally Posted by Pighunter
I have a 91 XJ 4.0L and after completely revamping my cooling system I can cruise at 70 on a 100 deg day and my dual electric fans will never coms on.
x2 a vehicle shouldn't need a fan on the highway to stay cool cause theres already so much air moving thru the radiator.

I did a taurus fan swap and rewired my aux fan for not much at all. The low setting on taurus fans is good enough to cool a 4.0l by itself.
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Old May 31, 2011 | 03:46 PM
  #20  
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From: Texas
Year: 1999
Model: Cherokee
Engine: INLINE 6, safari snorkel, kn airfilter, flowmaster 10 series exaust
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Even if it is hot outside(100+), on the freeway(65mph+) you shouldn't need your fans. If you do, your cooling system needs to be looked over......radiator, thermostat, water pump, fluid ratio and condition, etc. Your fans are for when no forced air is cooling your radiAtor. Good luck.
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Old May 31, 2011 | 04:21 PM
  #21  
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From: Utardiland
Year: whats left of a 91
Model: Cherokee
Engine: one that makes noise
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http://www.dirtboundoffroad.com/feat...onversion-kit/

this is what i run and it works great, keeps the jeep cool all day playing in the sand in 100 degree temps
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Old May 31, 2011 | 04:34 PM
  #22  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Originally Posted by bamfxj
Even if it is hot outside(100+), on the freeway(65mph+) you shouldn't need your fans. If you do, your cooling system needs to be looked over......radiator, thermostat, water pump, fluid ratio and condition, etc. Your fans are for when no forced air is cooling your radiAtor. Good luck.
x2
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Old May 31, 2011 | 04:36 PM
  #23  
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From: Elizabethtown, pa
Year: 1994
Model: Cherokee
Engine: 5.2
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I would say the rad is starting to clog/rot out. Check the radiator on the side closest to the battery, u will probably see the fins/cooling tubes of the rad are turning green, or the cooling fins have already just fell out.
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Old May 31, 2011 | 06:29 PM
  #24  
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From: Hayward, CA
Year: 1996
Model: Cherokee
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Originally Posted by jmaxj
http://www.dirtboundoffroad.com/feat...onversion-kit/

this is what i run and it works great, keeps the jeep cool all day playing in the sand in 100 degree temps
their new shroud is dumb. shrouds only help when they either surround the fan directly at the rad or if they can spread the fan's effect because its not directly on the rad. unfortunately, most electric fans are directly on the rad and all the shroud they have made with that is doing is blocking air from going through when you are at speed. also blocks the little airflow you get when slowly moving or the convective cooling you get while stopped. Its a great idea and looks quite good, but I bet in function it doesnt cool as well. That being said, with 3 e-fans it probably still has no problem cooling with their shroud when its 120* out driving straight up a hill with a trailer
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Old May 31, 2011 | 09:50 PM
  #25  
AVjeeper's Avatar
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Posts: 299
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From: Whittier, Ca
Year: 1989
Model: Cherokee
Engine: 4.0L
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1-Good clean unobstructed 3 row radiator
2-Undamaged fan shroud
3-Heavy duty fan clutch
4-190* Thremostat
5-Undamaged A/C fan
6-Good fan temp switch
7-Good water pump
Average temp 205*
Never goes over 215* at Edwards AFB in Mojave

Last edited by AVjeeper; May 31, 2011 at 10:00 PM. Reason: Forgot to list one component
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Old May 31, 2011 | 11:54 PM
  #26  
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From: Utardiland
Year: whats left of a 91
Model: Cherokee
Engine: one that makes noise
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Originally Posted by Hoooper
their new shroud is dumb. shrouds only help when they either surround the fan directly at the rad or if they can spread the fan's effect because its not directly on the rad. unfortunately, most electric fans are directly on the rad and all the shroud they have made with that is doing is blocking air from going through when you are at speed. also blocks the little airflow you get when slowly moving or the convective cooling you get while stopped. Its a great idea and looks quite good, but I bet in function it doesnt cool as well. That being said, with 3 e-fans it probably still has no problem cooling with their shroud when its 120* out driving straight up a hill with a trailer
i hear ya, i have his old style.

check this out though
http://www.naxja.org/forum/showthread.php?t=1057920

he did quite a few CFM tests on his and a couple other setups.
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