Mechanical Fan Input .....

Just looking to get an opinion from anyone that cares to give it :jester:



I have a ZJ fan in the shop (along with 2 XJ fans). The ZJ fan is approx. 2 inches larger in diameter. That means the radius is 1 inch each way (off centerline). Would that fit in the factory XJ shroud ?


I had 2 XJ shrouds. Gave one away ... and then a week later broke the 2nd one. :doh:



Obviously, I don't have a shroud here to test on.



I can make a new shroud to utilize the ZJ fan (but with the XJ clutch). I know for a fact there isn't enough room for the ZJ clutch with a 3 core radiator. But the extra fan will pull more air, for sure.


In terms of quick/easy .... it would be great if I found a cheap fan shroud and then just re-used the factory fan for now, in the dead of winter.




Anyone with input to share ? :dunno:

you don't need a shroud, it helps when you are idling but it isn't necessary unless you have other cooling problems that are made worse by the absence of a shroud. if you really want to do it right, you'll need to go buy a shroud from the dealer or a part-out and run the XJ fan

one back-burner project would be to look for a larger shroud. go-jeep's electric fan write-up said that he had a 16" opening, while the domestic models all had a 15" opening. maybe there was a larger shroud for some export markets.

I have used a ZJ fan before, just had a vibration problem when I first tried it.... it may have been the clutch itself though (high miles and old)... I later switched to an E-fan setup.. so don't know long term?

I'm a very firm believer in using the shroud and a mechanical fan. You couldn't convince me not to run one ... but that's another argument for another thread.



I was just trying to determine if the OE shroud would have enough clearance for the ZJ fan. If not .... I could make a shroud from scratch.



I might contact Go-Jeep and see if he can confirm the 16 inch dimensions and perhaps a part number. That would be a lot easier than making a shroud. Might have to do with the overseas diesel engine ?



I'll keep the electric fan on the driver side .... but you won't see me running full electrics right now.




Joe

Mr. Green ... the ZJ fan fit with no issues ? I assume it was close ?



Joe

IIRC,... the XJ clutch with ZJ blades fits tight... the shroud was cut slightly and allow for the taller blades....

theres was also a huge difference in air movement...... however I would think that long term would cause the stock clutch to fail faster

mgreen84 said:

theres was also a huge difference in air movement...... however I would think that long term would cause the stock clutch to fail faster

Click to expand...

I'm not sure if that would really be an issue. For instance ... for *some* aftermarket manufacturers, the YJ and XJ share the same clutch. And the YJ fan is even bigger than the ZJ one.



Something to keep in mind, regardless.




Joe

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