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Old 07-06-2014, 01:09 PM   #1
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Engine fan???!?! 02 TJ

Don't know what it's called either the radiator fan or engine Fan. But it's right in front of the radiator.

I have a 2002 TJ and my mechanic says that fan should be able to freely spin with out the engine on. And mine doesn't but it does when the engine is on. And no over heating problems so far!

Thanks

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Old 07-06-2014, 01:29 PM   #2
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And mine doesn't...
Meaning what, exactly?

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Old 07-06-2014, 01:50 PM   #3
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replace the fan clutch.
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Old 07-06-2014, 10:14 PM   #4
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Meaning what, exactly?
The shop guy said that that fan should be able to be turned by hand very easily. For mine it can be turned but it is very difficult. I looked at all my other cars and their fan is very easy to move.

And fan clutch. Hmmm didn't thjnk about that I'll look in to it thanks.
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Old 07-06-2014, 10:33 PM   #5
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And fan clutch. Hmmm didn't thjnk about that I'll look in to it thanks.
I just replaced mine last week in conjunction with a water pump replacement. It's almost like I got an engine overhaul; things a a lot less noisy now.
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Old 07-07-2014, 07:38 AM   #6
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I just replaced mine last week in conjunction with a water pump replacement. It's almost like I got an engine overhaul; things a a lot less noisy now.
How much did you drop on that if you don't mind me asking
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Old 07-07-2014, 09:28 AM   #7
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How much did you drop on that if you don't mind me asking
I was able to buy a Hayden clutch for under $30. Advance Auto sells the same clutch under the Imperial brand name. With a discount code and online order, you can come close to that price. (Code TRT25 will get $20 off a $50 order.)
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Old 07-07-2014, 09:38 AM   #8
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Don't know what it's called either the radiator fan or engine Fan. But it's right in front of the radiator.
Uh oh, how did that happen? Move that fan back behind the radiator where it belongs!!!
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Old 07-07-2014, 11:39 AM   #9
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Wait what? I was told the total opposite ... If my fan supposed to spin freely or not to indicate a bad fan clutch? I thought if it spun FREELY that was a BAD thing. Now i'm confused...
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Old 07-07-2014, 12:16 PM   #10
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The only valid way to test a fan clutch is with the engine running. Run a cold engine three minutes (that allows the fluid in the clutch to be properly distributed) and shut it down. If the fan keeps spinning, it's a good thing. Then shut down the engine when its hot. If the fan doesn't continue to spin, it's a good thing.
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Old 07-07-2014, 01:11 PM   #11
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The only valid way to test a fan clutch is with the engine running. Run a cold engine three minutes (that allows the fluid in the clutch to be properly distributed) and shut it down. If the fan keeps spinning, it's a good thing. Then shut down the engine when its hot. If the fan doesn't continue to spin, it's a good thing.
Okay so after driving my jeep for about 20 minutes, when I had my wife shut it down the fan stopped immediately. That rules out the fan clutch for me.
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Old 07-07-2014, 01:54 PM   #12
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Okay so after driving my jeep for about 20 minutes, when I had my wife shut it down the fan stopped immediately. That rules out the fan clutch for me.
I think he meant try spinning the fan by hand. When it's hot, the clutch should hold the fan firmer than when it's cold. The fan will always stop spinning on its own if the engine is off
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Old 07-07-2014, 03:29 PM   #13
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Okay so after driving my jeep for about 20 minutes, when I had my wife shut it down the fan stopped immediately. That rules out the fan clutch for me.
That's half the test.

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The fan will always stop spinning on its own if the engine is off
That's certainly true. But it's how fast the fan stops that matters. With a cold engine, the fan should slowly freewheel to a stop. With a hot engine, the fan should stop fairly abruptly with no freewheeling.
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Old 07-07-2014, 05:05 PM   #14
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That's half the test. That's certainly true. But it's how fast the fan stops that matters. With a cold engine, the fan should slowly freewheel to a stop. With a hot engine, the fan should stop fairly abruptly with no freewheeling.
My jeep was running for a bit when I shut it off and it stopped with the motor abruptly
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Old 07-07-2014, 05:33 PM   #15
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My jeep was running for a bit when I shut it off and it stopped with the motor abruptly
Typical and normal when in warm or hot conditions.
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Old 07-07-2014, 05:59 PM   #16
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Typical and normal when in warm or hot conditions.
awesome so that means it's operating correctly and my slight over heating issue when driving faster and idling is not my fan clutch. I'm hoping thermostat but I've been wanting to upgrade the radiator and add a trams cooler as well.
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Old 07-07-2014, 06:27 PM   #17
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awesome so that means it's operating correctly ...
As long as you don't care if it operates correctly when cold. If you do, complete the other half of the test. Improper operation when cold will waste fuel and rob power.
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Old 07-08-2014, 07:29 AM   #18
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Well I'd like to ensure its working 100% haha
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Old 07-09-2014, 06:38 PM   #19
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So if the motor is COLD (hasn't ran in a few days) the fan should spin: easy or no
So if the motor is HOT (ran for 20+ minutes) the fan should spin: easy or no

Thanks guys!
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Old 07-09-2014, 06:51 PM   #20
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If the engine is cold the fan should spin freely.as the engine warms up the fan becomes harder to spin freely in hince making the fan spin faster as the engine spins faster.if your worried about the fan not spinning fast enough you could upgrade to a flex fan that has no mechanical clutch so it spins the same rpm as the engine at all times.
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Old 07-09-2014, 06:54 PM   #21
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So if the motor is COLD (hasn't ran in a few days) the fan should spin: easy or no
So if the motor is HOT (ran for 20+ minutes) the fan should spin: easy or no

Thanks guys!
See post #10.
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Old 07-10-2014, 06:48 AM   #22
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Thanks guys! I have been asking on 40 different threads, I think i need to make my own to keep all my thoughts in one place. Tangofox, I really appreciate your help

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