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Old 06-14-2010, 04:25 PM
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Electric Fans

I have a few questions for anybody that has put an electric fan on their yj's rad (may be more specifically on a 2.5 4 cyl).

Would I want to pull the air (mount to the front of rad) or push the air (mount on back of rad)?

Is there any ideal fan I could get from a salvage yard to keep from buying a new aftermarket one?

Is there a way to hook it up so that it is automatic or is on a manual switch the the best option?

Any tips would be great. --thanks--
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Old 06-14-2010, 09:40 PM   #2
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You got some good questions. About the front or back of the radiator Its really up to you but I would suggest the back and have it draw the air in. It tends to make it more efficient. You can make it come on automatically (highly suggested) Dont use a manuel switch. It will only take one time to forget it and you may have all sorts of trouble if you forget. A simple temp sensor and a relay will work. Attached is a very crude picture of how it will sorta be. Oh the little black box would be the relay with wires running to it. And i left out the fan but one wire will be grounded and the positive will be hooked to the relay

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Old 06-14-2010, 09:47 PM   #3
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I used a Taurus fan from a junkyard cost me $15. I don't remember the year but its a 2 speed fan. If you wanted to get fancy you can wire it with two thermostats for a high and low or if you have A/C you can wire it with the high side coming on with the A/C. Mine runs fine on the low side and I'm running a v8 but i have the high side wired to switch just in case.
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Old 06-14-2010, 09:47 PM   #4
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I suggest a puller fan, meaning it's mounted inside of the engine bay between the rad and the engine. They are more efficient as stated and cool better. As to what fans to use, I'm not sure, measure your rad and look through junk yards to see what fits. I have used Ford Taurus Fans, 95ish year on s10's with the 4.3 and they work great! But it may not fit the wrangler. You can buy a cheap thermostat at autozone for $17, I've had mine for two years now.
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