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Old 03-25-2013, 09:13 PM   #1
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Default how do i know my fan clutch is bad?

thanks guys
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Old 03-25-2013, 09:35 PM   #2
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........u don't, +/-$35 gets a new one.
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Old 03-25-2013, 10:57 PM   #3
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........u don't, +/-$35 gets a new one.
Yup. Mukak, what's the symptom?
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Old 03-25-2013, 11:02 PM   #4
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I can tell you if your engine sounds more like a jet, it's seized.
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Old 03-25-2013, 11:16 PM   #5
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A good clutch should have some resistance when you spin it when the motor is cold. When the motor is hot, the fan should spin freely. Pretty simple to diagnose.
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Old 03-26-2013, 06:10 AM   #6
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A good clutch should have some resistance when you spin it when the motor is cold. When the motor is hot, the fan should spin freely. Pretty simple to diagnose.
Sure about that? The hotter it gets, the more it spins at shaft speed, not less.
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Old 03-26-2013, 07:39 AM   #7
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Telltale symptom: begins to overheat when sitting still, cools fine when in motion.

Normal operation: Fan clutch gains resistance as it pulls warmer air over it. At higher temperatures it will sound like a roaring fan from a big truck if you rev the engine. If you have an IR thermometer, start gently heating the fan with a torch (don't melt anything!) around 190ish it should make some noise as it pulls more air.

There's a much longer technical test but it would cost you the same as a new fan clutch in terms of time and money invested in the test.
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Old 03-26-2013, 08:12 AM   #8
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Quote:
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A good clutch should have [ LITTLE] resistance when you spin it when the motor is cold. When the motor is hot, the fan should [NOT]spin freely. Pretty simple to diagnose.
fixed
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Old 03-26-2013, 08:31 AM   #9
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I think there's a YouTube vid that shows the use of a rolled up newspaper being used to slow/stop the fan while the engine is running (hot). I guess it works.
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Old 03-26-2013, 08:48 AM   #10
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I think there's a YouTube vid that shows the use of a rolled up newspaper being used to slow/stop the fan while the engine is running (hot). I guess it works.
I am sorry. But I would NEVER recommend putting anything in to the fan while a vehicle is running. Have you ever seen what the fan can do to a hand if it is pulled into it??? I have and it is not a pretty site to see. And this is coming from a guy that has done body pick ups after murders and suicides for a few years. I am just putting this because I would rather spend a few buck and change it then lose a finger of a hand.
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Old 03-26-2013, 09:06 AM   #11
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Here's how to cut your fingers off...

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Old 03-26-2013, 09:27 AM   #12
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How do I know if my fan clutch is bad?........

Quote:
Originally Posted by MUKAK View Post
thanks guys
.....or more like how do I know if my fan clutch is good? I say to myself....self, I just spent $35 for a new fan clutch and I took 15-20 min to put it in. Since it's new, I'm reasonably sure it's good, operating at peak efficiency, I still have all my fingers, I'm not guessing if it should spin more or less when hot or cold and......is it just me, or does it sound like pistons are swappin' holes on that beamer?
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Old 03-26-2013, 11:44 AM   #13
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Quote:
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fixed
So, What did you do????
Did you change it???
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I had a real bad and annoying sound come from my passenger seat also. But once I broke up with my girl friend it's a LOT better...

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1994 XJ 4X4 -- T-Boned By a lady running a red light.
1995 XJ 4X4 -- Rolled over 3 time while off road.
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Old 03-26-2013, 12:57 PM   #14
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Sure about that? The hotter it gets, the more it spins at shaft speed, not less.
Yes, my bad.
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Old 03-26-2013, 06:17 PM   #15
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So, What did you do????
Did you change it???
im not the OP, i just fixed someones incorrect info
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Old 03-26-2013, 06:17 PM
 
 
 
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