Dual Electric Fans or Grand Cherokee Fan Clutch?

[jeepxj95]

my clutch fan is toast. i just hope it dont take out my radiator while i figure out what to do. do i buy another $30 e fan (from amazon) that works great. it would give 3000 cfm togetger. or do i d try the zj clutch fan mod.

[jccatt]

Whats wrong with replacing the stock one.

[LizardRunner]

If you go to two electric fans you will need to make sure one comes on at around 180-190 degrees water temp and the second one comes on with the aircon. The main advantage of not having a belt driven fan is less drag on the engine from the clutch type fan, and if the belt breaks, you don't loose cooling ability. Lots of race cars have only the oil pump and alternator belt driven so they aren't loosing hp to belt driven things like water pumps, fans, etc. Magnetos are used on drag cars so there isn't even an alternator.

[4.3LXJ]

I wired my fans together. They are either both on or both off. Makes it simpler. On at 200° and off at 190°

[xj4life2]

I like the ZJ mod myself , however as I think Tony said they do "sing" at the higher RPMs . But the do lock up quicker and alot more positive.

[ike]

ZJ if you've good good engine mounts. i've found that a sock type replacement thermal is just as good. i've got a new ZJ clutch setting in the shop, took it off cause there's not much room if you've got a 3-core radiator. they do make a little more noise but not bad and not really any worse than a good thermal replacement such as #2737.

http://www.haydenauto.com/upload/HaydenAuto/Documents/Cat_Hayden/2007-hayden-fan-clutch.pdf

[Mudderoy]

ZJ if you've good good engine mounts. i've found that a sock type replacement thermal is just as good. i've got a new ZJ clutch setting in the shop, took it off cause there's not much room if you've got a 3-core radiator. they do make a little more noise but not bad and not really any worse than a good thermal replacement such as #2737.

http://www.haydenauto.com/upload/HaydenAuto/Documents/Cat_Hayden/2007-hayden-fan-clutch.pdf

I've been running my HD Grand Cherokee clutch for about 2 years with a CSF 3 core radiator.

[jeepxj95]

i want to try zj fan but no money and i think my motor mounts arert in the best shape. when i replaced the oem e fan with a aftermarket one i wired it in the factory wiring harness so it comes on with ac. and it still works with the bypass switch. if or when i add the second e fan ill just hook it up to a toggle switch. i keep a close eye on my temp.

[jeepxj95]

the noise dont bother me of the fan. my dads got a 96 zj so im use to it.

[ike]

The ZJ in most cases may be ok, but after seeing how much the engine moves around on good rubber mounts (driving without the hood on) I feel better about my call to change to the 2737 as it is 3.24” tall vs the ZJ 2796 @ 3.65”. That was the only reason I changed. Just didn’t want to risk contact between the two.

I’ve only read of 1 instance where the ZJ clutch got into the CFS 3-core, but that was enough for me.

“IF” something was to happen causing the engine to move forward…that ¼” could make the difference with that strap on the CSF 3-core.

That being said I couldn’t tell any performance difference last summer between the two.

91-99 CJ5-8, YJ, TJ, XJ, LJ,ect #2737 Heavy Duty thermal p. 43

04-99 GC #2796 Severe Duty thermal p. 44

It’s all about options.

[Mudderoy]

The ZJ in most cases may be ok, but after seeing how much the engine moves around on good rubber mounts (driving without the hood on) I feel better about my call to change to the 2737 as it is 3.24” tall vs the ZJ 2796 @ 3.65”. That was the only reason I changed. Just didn’t want to risk contact between the two.

I’ve only read of 1 instance where the ZJ clutch got into the CFS 3-core, but that was enough for me.

“IF” something was to happen causing the engine to move forward…that ¼” could make the difference with that strap on the CSF 3-core.

That being said I couldn’t tell any performance difference last summer between the two.

91-99 CJ5-8, YJ, TJ, XJ, LJ,ect #2737 Heavy Duty thermal p. 43

04-99 GC #2796 Severe Duty thermal p. 44

It’s all about options.

Yeah it is close. I didn't notice a mpg hit, but I did notice that the coolant temp drops more rapidly. Nothing I have done has "cured" my heat creep on the highway problem. It got better, but not fixed.

[jeepxj95]

got my clutch fan yesterday will try that first. will put it on tomarrow some time then give a update later on

[jeepxj95]

got in 2day. works alsome even with out a shoud (95 2day). until i turnd around. rolling backwards and i put it in drive and herd a sound. turns out it rubd my radiator. so guess ill be doing motor and trans mounts this weekend. yay not. and then save up 4 a radiator that the clutch hit just enough to make about 3 small leaks. but it workd great 4 about an hour lol

[jeepxj95]

The ZJ in most cases may be ok, but after seeing how much the engine moves around on good rubber mounts (driving without the hood on) I feel better about my call to change to the 2737 as it is 3.24? tall vs the ZJ 2796 @ 3.65?. That was the only reason I changed. Just didn?t want to risk contact between the two.

I?ve only read of 1 instance where the ZJ clutch got into the CFS 3-core, but that was enough for me.

?IF? something was to happen causing the engine to move forward?that ¼? could make the difference with that strap on the CSF 3-core.

That being said I couldn?t tell any performance difference last summer between the two.

91-99 CJ5-8, YJ, TJ, XJ, LJ,ect #2737 Heavy Duty thermal p. 43

04-99 GC #2796 Severe Duty thermal p. 44

It?s all about options.

the clutch fan i got was for a 97 zj. and i still had to take out one of the straps

[Olie's87XJ]

I used the passenger side electric fan out of a '99 3.0l Taurus, its dual speed, and fits in the original mech. fan shroud with minimal work. granted it takes more time to wire it with switches and relays and all, but it's all for the better. I wheeled this setup, with a second "new era" a/c fan on a manual switch in temps of 42*C a couple weeks ago, and only had to switch the taurus fan to high while idling. My mech fan never did that. I would have to stop every 15 or so min. and shutdown in attempt to keep it from over heating.

here are a few pics...

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10499.jpg

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10500.jpg

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10503.jpg

[jeepxj95]

so far so good haven't wheeld yet still need to do motor and trans mounts to keep it from eating my radiator again. one day i will run dual e fans.

[jeepxj95]

I used the passenger side electric fan out of a '99 3.0l Taurus, its dual speed, and fits in the original mech. fan shroud with minimal work. granted it takes more time to wire it with switches and relays and all, but it's all for the better. I wheeled this setup, with a second "new era" a/c fan on a manual switch in temps of 42*C a couple weeks ago, and only had to switch the taurus fan to high while idling. My mech fan never did that. I would have to stop every 15 or so min. and shutdown in attempt to keep it from over heating.

here are a few pics...

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10499.jpg

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10500.jpg

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10503.jpg

do u have any pix of it installed?

[bluedragon436]

I would def. go for a ZJ HD fan clutch.. that is teh one I am going to go with after I take care of a few other upgrades that are needed first.. If I can get the money together first then I will purchase the E-fan upgrade from DirtBound on here..

[Mudderoy]

https://lh4.googleusercontent.com/-7Kb2iI4LIak/TieYaTffTXI/AAAAAAAABEg/JkHuNGTUEvU/s720/2011-07-20%25252019.59.07.jpg

[jeepxj95]

https://lh4.googleusercontent.com/-7Kb2iI4LIak/TieYaTffTXI/AAAAAAAABEg/JkHuNGTUEvU/s720/2011-07-20%25252019.59.07.jpg

my zj clutch fan sits closer then that. and i think it is the stock radiator. idk but i think if i would of done a cheap dual fan convertion i would not be looking at a new radiator right now

[jeepxj95]

I would def. go for a ZJ HD fan clutch.. that is teh one I am going to go with after I take care of a few other upgrades that are needed first.. If I can get the money together first then I will purchase the E-fan upgrade from DirtBound on here..

i would like to get one of those also. but didnt have the cash for it last month. i will one day tho

[saar]

I would go with the electric fan.
I'm thinking about it as the next mod for my xj.
Saar

[jeepxj95]

I would go with the electric fan.
I'm thinking about it as the next mod for my xj.
Saar

what fans do u plan on running?

[jeepxj95]

sunday i did motor and trans mounts. wow thos where bad. i do have more room but only about a 1/2 inch or so. AND NO MOVEMENT YAY

[Mudderoy]

sunday i did motor and trans mounts. wow thos where bad. i do have more room but only about a 1/2 inch or so. AND NO MOVEMENT YAY

:wow: I know you feel better about driving it now. I bet it will feel more solid too.

[jeepxj95]

very. shifts also feel smoother. im not afraid to pass any more. now i can go wheeling ( i know the club misses the heep ).

[Olie's87XJ]

do u have any pix of it installed?

sorry had technical difficulties this week, computer crashed. I'll take a few pics in the mornin'

[jeepxj95]

sorry had technical difficulties this week, computer crashed. I'll take a few pics in the mornin'

pictures???

[Olie's87XJ]

pictures???

sorry fellas, it completely slipped my mind. I have a few pics, they are hard to see due to the size of the shroud. This is mounted on a renix era jeep as well, as it stands there is about 3/4'' between the back of the fan and the nuts that hold the pulley on. I think it touches a bit, if i get really crossed up with the doors off due to the flex. never actually got out to check. lol

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10515.jpg

http://i1097.photobucket.com/albums/g343/oliethegoalie32/SDC10516.jpg

Hope it helps!!

[jeepxj95]

yes it does. thanks. does it keep it kool?

[Olie's87XJ]

yep, sure does, it got up to 40*C up here this summer, and never had a problem. Only had to put it on high a few times while crawling. However, I always run my auxiliary fan (the one on the driver's side) b/c my trans cooler is in front of it. Overall I'm happy with it, I feel better when wheeling in the heat knowing I have full control of the fans, and can leave them on after the vehicle is shut off.

[jeepxj95]

update last week i took off my zj fan and put on a good used stock fan from the 90. i was tired of it hitting my fan. i think it rubs becase of the deer accident from when the PO hit the deer. so eventally i will figure out a fan set up either the zj fan again or a good electric set up. maybe after i put a new fender on and a new grill support. but who knows how long it will be be4 i will do that. after that im thinking of getting it painted :)

but i did love the clutch fan and will recomend it to every xj owner i know but i will tell them my story as a word of caution

[steph74]

I wired my fans together. They are either both on or both off. Makes it simpler. On at 200° and off at 190°

Are you saying that it is OK if the fact that the mechanical fan is on all the time regardless of temperature is a waste of energy ?
Just curious because mine is and sometimes it really takes a long time to reach temperature especially in the winter

[4.3LXJ]

Are you saying that it is OK if the fact that the mechanical fan is on all the time regardless of temperature is a waste of energy ?
Just curious because mine is and sometimes it really takes a long time to reach temperature especially in the winter

I don't have a mechanical fan. I have two efans. So I wired the rleays to the same sensor.

[jeepxj95]

??? would 2 14" fans be enough to kool the 4.0. im sure it wouldnt be for the summer but i have another plan for that. and they would be ran all the time for in town traffic. around 35 mph or so.

[4.3LXJ]

You need to hit 4000 cfm between them for effective cooling year round

[jeepxj95]

k thanks im looking at 2 16" fans later on. but i mean for temps high as like 50 or so.

[4.3LXJ]

Should work then. I wanted to mount two Taurus fans, but just couldn't make them fit. Steering box is in the way.

[jeepxj95]

yeah that the issue with the 14 i have now but i zipped tied that sob in place so it dont move. and with the 2 14's ithere should be around 3000 cfms :)

[4.3LXJ]

3000 cfm is about what the stock mechanical fan will pull. This will do for winter, but come summer it won't

[jeepxj95]

hopefully ill have a job by then ill post what my idea is for the e fan set up :) i think it will work alsome

[OhJeepers]

Say this an kinda in a hurry Idk if any one else has said this but your clutch fans robs horse power from you motor, idk if thats a major thing for you but it is for me seeing as I look at function in in ever aspect I can now that I have began to learn more an more about trail riding an especially my fancy for rock crawling. So dual electric fans give back horse power, an saves on energy, plus can be completely controlled from in cab if you want. personally dual elec are in my opinion the way to go but again thats my opinion lol

[jeepxj95]

finally added my 14inch fan i had for 2 weeks. wow does it kool down faster then with just the 12 inch lol. and the best part is that there both wired in with the factory wiring :) idles up to 210 turn on cools down in like 3 mins to 185 ish turn off with switch 215 forgot to watch temp gage turn back on give little gas likke at a grand 5 secs to 210 then about 10 more secs to 195- 200ish turn jeep off. very happy cant wait to get my 2 16's or buy the 3 10inch lit from one of the venders. that would be cheaper buy my 2 16's would flow more cfms... hmm choices to make. this is a repost from one of the other trends on here