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Is my Fan Clutch Bad?

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Old Oct 27, 2014 | 11:27 PM
  #16  
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Since everything else has been changed , fan clutch is about the last thing to be switched out.

Did you check to see if your radiator is circulating and your thermostat is opening properly and fully ?
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Old Oct 27, 2014 | 11:31 PM
  #17  
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Originally Posted by mikerosa
Since everything else has been changed , fan clutch is about the last thing to be switched out.

Did you check to see if your radiator is circulating and your thermostat is opening properly and fully ?
short of squeezing the upper hose when its up to temp, is there another way to check?
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Old Oct 28, 2014 | 05:00 AM
  #18  
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Fans gotta be removed when shrouds installed . If funds permit do the clutch while its off that way your sure when a new one was installed for future reference . JM2CW
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Old Oct 28, 2014 | 05:44 AM
  #19  
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Originally Posted by DieselD
..As for the fan clutch is skip the ZJ fan clutch. Got one by accident it was the wrong part. Said ah well its an upgrade anyway. I couldn't stand hearing the damn thing all the time, it literally NEVER disengages even a little. It sounds like an 18 wheelers fan when you accelerate. It'd be a waste if you ask me and annoying. Not saying don't do it but just a heads up to ya.
Originally Posted by djb383
..and DieselD is spot on with regard to a HD clutch making way more noise. We tried it.....couldn't get it off fast enough, way too much noise.
Lets add a third opinion here:Same here, got the wrong part (the ZJ clutch) sent, thought : well, its said to be an upgrade. Made more noise than anything, did nothing more cooling-wise than the correct clutch I got instead a.s.a.p. The HD clutch also reduced the clearance with the HB to about 1 cm, which, looking at it turning at speed, was far less than I was comfortable with.New Xj clutch worked fine.

Fan clutch tests are unreliable. Forget them. Mine tested good with all those spinning cold/warm/etc and still turned out to be subpar, once I put the new one in. When in doubt, replace it, its not an expensive item.
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Old Oct 28, 2014 | 10:42 AM
  #20  
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Originally Posted by mikerosa
..........Did you check to see if your radiator is circulating and your thermostat is opening properly and fully ?
Originally Posted by noisufnoc
short of squeezing the upper hose when its up to temp, is there another way to check?
The t-stat can easily be tested/checked for proper operation in a pan of water, on top of the stove, using cooking thermometer. It should appear closed at it's temp rating, be 1/4"-3/8" open (wide open) at +/-15* above it's temp rating and move very slowly/smoothly between open/closed positions.

Last edited by djb383; Oct 28, 2014 at 10:44 AM.
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Old Oct 28, 2014 | 11:00 AM
  #21  
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Originally Posted by djb383
The t-stat can easily be tested/checked for proper operation in a pan of water, on top of the stove, using cooking thermometer. It should appear closed at it's temp rating, be 1/4"-3/8" open (wide open) at +/-15* above it's temp rating and move very slowly/smoothly between open/closed positions.
at that point wouldn't it just be less effort to replace it? its all of a <$10 part.
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Old Oct 28, 2014 | 01:21 PM
  #22  
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Not to me. I'd rather save the ($23 in my case), AND I might check the new since too often the older is better than the new.
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Old Oct 28, 2014 | 01:27 PM
  #23  
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Originally Posted by noisufnoc
at that point wouldn't it just be less effort to replace it? its all of a <$10 part.
From a pure effort standpoint, I suppose so. But why throw away a perfectly good $10 bill?......not to mention the gas/time spent driving to get that new $10 bill. If u throw away a good old $10 bill, u best test that new $10 bill before u install it. In <than 10 minutes, either one, old or new, can be proven good........................or not.
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Old Oct 28, 2014 | 02:33 PM
  #24  
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Originally Posted by djb383
From a pure effort standpoint, I suppose so. But why throw away a perfectly good $10 bill?......not to mention the gas/time spent driving to get that new $10 bill. If u throw away a good old $10 bill, u best test that new $10 bill before u install it. In <than 10 minutes, either one, old or new, can be proven good........................or not.
to each their own, looks like Amazon has the tstats for $6.79 w/ prime shipping.

good info none-the-less for testing it. thanks!
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Old Oct 28, 2014 | 07:44 PM
  #25  
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......and if u buy it at a local auto parts store and something is not right, it's easily exchanged, u don't have to wait days on mail order.
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