Aux electric cooling fan - JeepForum.com
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post #1 of 9 Old 05-19-2021, 06:37 AM Thread Starter
jeeptorino68
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Aux electric cooling fan

I have a 2008 4.7 with just the standard electric cooling fan. With aluminum heads id like to have an auxiliary fan to prevent overheating...
I saw this post which was great:
https://www.jeepforum.com/forum/f67/...c-fan-4424915/

Id like to get a fan that comes with a more complete wiring package and temp switch. Anyone have suggestions? 14 or 16 inch fan that comes on at 200 or 210 probably.

Also, i see some fan temp switches come with a threaded coolant sensor. Does anyone know what kind of threads the factory coolant sensor is? If I knew, I could put a tee there and then the aux fan sensor can get the same coolant reading as the pcm


Kyle
92 XJ 4.0 HO,AW4, NP242, 30" BFG AT, 1.75 spacer and ZJ coils, double cherokee leaf pack and 2 inch rough country shackles, 2.5 inch dnynomax exhaust, magnaflow cat, front hooks & rear hitch, gas skid, front skid, warn t-case skid, 99+ intake, bored TB

02 KJ Limited, 255 70 16s, front skid, LS/373 gears
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post #2 of 9 Old 05-19-2021, 07:33 AM
Gray203m
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Can't help with the factory sensor, but you could pull it out and check if it isn't too awful to get to, or see if a local parts store has one in stock and check there.

As far as fans, if you're thinking the same mounting location, just make sure you are using a pusher fan. You can use nearly any controller for the fan. I've had good luck with the Hayden 3651 unit, which has a 1/8"npt sensor. On another vehicle of mine I picked up normal temperature switches with a preset on temp for around $10, which I used to switch a standard 12v relay

2008 WK CRD North
GDE Eco Tune, DPF Delete
2" RC lift, 265/65R18 Duratracs
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post #3 of 9 Old 05-19-2021, 02:12 PM
MA_Racing27
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You be replacing the factory temp sensor or you will have a check.engine light for implausible engine temp after a few minutes of driving. The Hemi didn't have a good place on the water pump to drill and tap so I used a radiator hose sensor adapter for my temp switch. I removed the entire factory fan system and installed 2 14 inch fans to pull air through the radiator(so my fans are on the engine side of the radiator) I am currently modifying my factory shroud to accommodate the electric fans and look very factory. Right bow they are just zap strapped to the radiator. It has been working fenominaly well even under heaving pulls. I will have a full write up on the in a week or so. You can private message me if.you have questions on the details or post here in your thread to share the information with fellow readers.
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post #4 of 9 Old 05-19-2021, 02:15 PM
MA_Racing27
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You can see the adapter sitting next to the new hose. You just splice it into the upper hose. Make.sure to get the correct diameter adapter.
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post #5 of 9 Old 05-19-2021, 02:28 PM
Gray203m
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Quote:
Originally Posted by MA_Racing27 View Post
You can see the adapter sitting next to the new hose. You just splice it into the upper hose. Make.sure to get the correct diameter adapter.
Those adapters are the bees knees for easy installs. Unless you use a temperature switch instead of a sensor, and end up having to drill and tap a small hole in the adapter for a ground wire. Ask me how I know....

2008 WK CRD North
GDE Eco Tune, DPF Delete
2" RC lift, 265/65R18 Duratracs
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post #6 of 9 Old 05-19-2021, 09:06 PM
sgossler
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I have a 2005 WK with a 4.7 V8. It has the factory auxiliary cooling fan, standard equipment with the tow package. It uses a fan clutch driven directly by the engine pully. It also has the electric cooling fan.

2005 Jeep GC Limited 4.7 QTII
2.3" RRO lift Bilstein Struts/Shocks 255/70R17 Cooper AT3
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post #7 of 9 Old 05-20-2021, 06:23 AM Thread Starter
jeeptorino68
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This setup would be fine with me too, but i have never been able to pin down the clutch and fan blade oart numbers. Or find where I can buy a clutch and fan blade combo. Everyone sells just the clutch....

Kyle
92 XJ 4.0 HO,AW4, NP242, 30" BFG AT, 1.75 spacer and ZJ coils, double cherokee leaf pack and 2 inch rough country shackles, 2.5 inch dnynomax exhaust, magnaflow cat, front hooks & rear hitch, gas skid, front skid, warn t-case skid, 99+ intake, bored TB

02 KJ Limited, 255 70 16s, front skid, LS/373 gears
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post #8 of 9 Old 05-20-2021, 06:26 AM Thread Starter
jeeptorino68
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Thanks for the info. Getting a sensor from the autoparts store to check the threads is a good idea. Yea same spot for the fan is what I was thinking

Kyle
92 XJ 4.0 HO,AW4, NP242, 30" BFG AT, 1.75 spacer and ZJ coils, double cherokee leaf pack and 2 inch rough country shackles, 2.5 inch dnynomax exhaust, magnaflow cat, front hooks & rear hitch, gas skid, front skid, warn t-case skid, 99+ intake, bored TB

02 KJ Limited, 255 70 16s, front skid, LS/373 gears
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post #9 of 9 Old 05-21-2021, 11:39 AM
MA_Racing27
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This adapter had a ground screw to ground the switch. It has worked flawlessly since install. For the fan install I modified my factory shroud. Cut off everything pertaining to the factory fan and glued a piece of plastic over that, that I will cut the large holes in for the 2 fans and then reinstall the factory shroud. I wanted to keep it all looking very clean and like it was manufactured that way. This was I could also re hang the factory power steering resivoir which I reused in the original location.
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