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Removing Fan Clutch From Water Pump


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#1 97whitez71

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Posted 16 July 2010 - 08:55 AM

I've got to replace my fan clutch and can't remember for sure if the threads on the nut holding it onto the water pump or right handed or left handed. I'm pretty sure they are left handed; but I wanted to check before I started banging. Does anyone know for sure? It's on my '97 Z71. Thanks!

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#2 redvett

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Posted 16 July 2010 - 09:10 AM

Righty tighty & lefty loosey.

#3 Matt_

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Posted 16 July 2010 - 09:19 AM

the fan is self tightening. so just look at the direction the fan is spinning when the engine is running, thats the direction you need to spin the nut to loosen it.
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#4 97whitez71

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Posted 16 July 2010 - 09:24 AM

The nut on my fan clutch has notches in it kind of like most left hand threaded nuts do. The new one I bought does not have those notches. When I replaced my water pump way back when, I could have sworn it was left hand threads (I brought it to a shop then and they used an air chisel to remove it. I don't have one of those lying around the house). I'll check the direction the fan spins. Thanks!

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#5 NickV

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Posted 16 July 2010 - 09:35 AM

right hand threads on the last one I removed (95 model). I usually get them off by putting a pipe wrench on it and whacking the tip of the handle with a BFH until it pops loose.

WARNING: Above advice is based on actual experience or just plain common sense. In the event said advise is determined to be incorrect you are entitled to a full refund of exactly what you paid for it.

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#6 Matt_

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Posted 16 July 2010 - 09:35 AM

:troll: an air chisel? ive had some tight fan clutches before.... never have needed an air chisel though (nor would i want to use one for that), just a few taps with a hammer always does the trick
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#7 Matt_

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Posted 16 July 2010 - 09:41 AM

another thing that helps is to leave the serp belt on and add tension to the belt via a 3/8 ratchet rotating the tensioner.

that often has enough resistance to break loose the fan clutch with a few taps of the hammer.... unless the previous guy who installed the fan was dumb enough to tighten it down with all his might (you just want to snug it up... resistance from the fan does the rest)
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#8 snakedoctor

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Posted 16 July 2010 - 09:49 AM

The last one I removed was right hand thread. I put a big wrench on the nut and hit the wrench a few times with a BFH and it broke loose.

Edited by snakedoctor, 16 July 2010 - 09:49 AM.


#9 97whitez71

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Posted 16 July 2010 - 09:55 AM

Thanks guys! Going to tackle it after lunch today.

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#10 97whitez71

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Posted 16 July 2010 - 05:06 PM

I've tried everything and this mother is not coming off. I broke one fan clutch pulley holding tool and tried everything else I've read on here. I'm at a complete loss.

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1960 4x4 Willys Wagon


#11 snakedoctor

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Posted 16 July 2010 - 05:30 PM

http://performancetr...=fan clutch nut

#12 Silverado4x4

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Posted 16 July 2010 - 05:35 PM

Try heating up the bolt heads with a hand held torch, the other owner may have used thread locker and some of the thread locker types has to be heated to remove.

Edited by Silverado4x4, 16 July 2010 - 05:36 PM.

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#13 97whitez71

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Posted 19 July 2010 - 08:40 AM

Just for the record, I ended up renting the tool set made for Ford's (hard to type that word) and was able to get the nut off. I'd rather do a 4 wheel brake job than mess with that single nut again. Thanks for all the suggestions!

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'01 C1500 Suburban

1960 4x4 Willys Wagon


#14 pelletman

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Posted 31 January 2011 - 03:57 PM

The best way to get these things off is with an air chisel / hammer. Zips right off. I couldn't believe it.

#15 chas0218

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Posted 31 January 2011 - 06:03 PM

Just took mine off and lefty loosey will get the job done. I struggled for about 30 mins until I wrapped a rachet strap's strap around the pulley and tighten it by spinnging a wrench in the strap ends. once tight I wedged it between 2 pulleys and twisted the nut off. I also gave it a few taps with the hammer to try and free it up.




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