Swapping a ZJ Fan Clutch in a 2000 Jeep Cherokee
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- Опубліковано 13 вер 2024
- As mentioned in the end of the video, make sure that the rest of your cooling system is operational before doing this. This isn't intended to be a fix for your overheating in normal conditions. While I did this upgrade at first to see if it would help my jeep when it gets warm at idle on a 90+ degree day and the ac on and idling, I ultimately found that it offered no benefits for low rpm cooling problems. I did notice a significant improvement in cooling when I was at the dunes and working the engine really hard. Hottest it ever got was around 200 degrees, where the XJ clutch would result in about 220. Which isn't bad, but I wanted more cooling.
This is a noticeably louder setup, it sounds like a dump truck when driving and I found its especially louder with a manual transmission. Last time I had the ZJ clutch on, my jeep was an auto, and I did notice a loss in power, a less quick rev, and about a 1.5mpg loss in fuel economy. But if your interest is in staying as cool as possible because you intend to work the jeep hard, this is a solid upgrade that I've had tangible results with.
best of luck!
Thanks for your insight. The Fan clutch in my Comanche actually works as the one you reviewed here. You can floor the pedal to the metal and the fan does rev instantly. The idle temperature cannot be controlled by the main fan at all. This metal fan only covers half of the radiator area. That's why is so important to ensure that the electric fan works properly. Since my jeep has a Jeep ZJ PCM, an temperature switch was installed on the lower coolant hose to activate the electric fan relay.
You can tighten the spring on the front of your stock clutch, needle nose pliers,takes about 10 seconds
I did mine and i noticed about the same results as this . If im moving it stays around 190ish and if i idle for a few in summer it gets 210ish . I live in high desert with low humidity,
Oh interesting
I did this for the hot summers in az. But my issue I ran into was the mechanical fan blade hit the shroud
Only reason I can imagine why that would happen is if your motor mounts were worn out, used the wrong clutch, or maybe a loose fan shroud? Not saying it’s not possible, but I’ve ran one for over 6 months without an issue. And can speak for others too
ANY SUGGESTIONS??M....
Is it really that loud?, Like people have stated on forums?
I've read other's who've gone back to stock because of how noisy it is....
I did this to my Jeep XJ in CA, 110 degrees summer no problems, best mod you can do to an XJ. The Jeep slower though
Oh absolutely. It’s remarkably better in cooling. But I absolutely noticed the loss in power to the ground
Is it really that loud?, Like people have stated on forums?
I've read other's who've gone back to stock because of how noisy it is....
i got the same problem. i just want to eat in a mcdonalds parking lot without my jeep heatsoaking, mine idling goes up to 220 but my main concern is stopping the heatsoaking problem so i got the fuel rail insulating kit but also got this hoping it would keep it cooler when idling. some people run a 180 thermostat vs 195, that could help. but i guess the e fan override doesnt work either? if i had trail jeep i would put hood spacers on the hinges but i hope i dont have to do that.
220 actually isn’t unreasonable at all. E fans don’t even turn on until 218°-222° depending on your year, so it’s very reasonable to be at that temp. I sat at a local burger joint with a friend while it was 95° out with ac blowing cold for an hour and never went above 221°. Fuel rail wrap kit helped me a lot with heat soak prevention. And I personally don’t think a lower thermostat temp is the way to go. Unless your current thermostat is bad, it won’t change how the temps behave. Opening the thermostat earlier only delays the engine getting hotter by a few minutes, and as soon as it’s at a certain temp, it’s pretty much not gonna change anything because coolant is flowing anyways. I had a thermostat that was a 180° last year and all it did was stay too cool on the highway and hurt highway mpg. From my perspective I noticed zero change in idling cooling performance.
I did a test a few days ago and with 85° weather ac full blast and the hood open, it leveled out to 205° (e fan was toggled on), ac full blast e fan on and hood closed immediately leveled out to 221°, and ac off hood closed with e fan on went to 210° and getting rpm’s to 1500 dropped to 195° quick. What this tells me is better ventilation from the engine bay should help. I intend to do hood vents. Having an e fan toggle has helped, I’ve found. Instead of temps cycling up and down as the fan turns on and off, you can force it on to keep temps as low as possible. I’m happy with the toggle
@@xj_overlander thats good to hear i just bought the relay kit for the e fan im going to try that as well, when my engines hot after i shut the engine off and turn it back on i have a cylinder 1 misfire and im hoping the insulating kit solves that problem and like you said the only thing to do if everything else dont work is to add ventilation to the engine bay. i have the 0331 head and dont want to deal with the dreaded crack yet. it has not been below 100 degrees for the last month or so where live.. Thanks for the vid!
@@xj_overlander🙏
Did you notice any loss in power? My 4.slow can’t afford too much loss with 35 inch tires haha
I did notice some. Jeep sounds like a dump truck but it was a little noticeable. But you'll be hard pressed to find a better fan setup. I've been in the sand driving really hard and never went over 200⁰ I think it's worth the experiment. I opt to swap the ZJ fan clutch in during hot summer months and put the XJ one back in for any other time. It's a good tradeoff
Nice video
Thanks!
👍🏻
where did you buy the fan clutch?
I got mine from Napa
I have a 2000xj what year do i need of a zj clutch?
I believe 98, but it might be worth checking out the forums on this. I know I’m late on the reply though. What I do remember is you do not get the heaviest duty clutch, it won’t fit. I believe you just get the regular ZJ fan clutch for the 4.0
What year of zj
I can’t remember. 98 I believe. Though I think all are the same