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Loosening Fan Clutch Nut

Old 02-02-2018, 07:34 PM
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Loosening Fan Clutch Nut

Any tips on loosening a stuck fan clutch nut? I know it's a left hand thread, and to loosen it I should turn it clockwise. I can't seem to budge it. I've tried to stick a screwdriver between the pulley bolt heads, but I can't budge the thing. I'm using a 36 mm fan clutch wrench I borrowed from NAPA.
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Old 02-02-2018, 11:08 PM
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I've had good luck with locking chain pliers (vice grip type) right on the fan pulley, with a good rag under it to protect pulley. Smacking the edge of the nut with a long chisel to loosen it (cw) can help free it up. Cheater bars/pipes can be your friend too.
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Old 02-02-2018, 11:26 PM
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If you have access to an air chisel, place the tip on the edge of the nut, pointed in the correct direction, and a very short burst usually cracks it loose without any damage.
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Old 02-03-2018, 01:26 AM
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Great suggestions both. Thanks gents.
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Old 02-03-2018, 09:08 AM
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Buy, or make yourself, a clutch fan wrench set.

Once the one wrench is on the clutch fan nut, I smack it with a hammer, which releases it.

I made my own set from scrap steel, but I've seen them for sale on eBay or Amazon for about $25
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Old 02-03-2018, 11:12 AM
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I borrowed one from NAPA and climbed up on top the engine and put my whole weight on it while holding the pulley with a screwdriver and I still couldn't budge it.
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Old 02-03-2018, 06:46 PM
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Originally Posted by Robert Rausch View Post
I borrowed one from NAPA and climbed up on top the engine and put my whole weight on it while holding the pulley with a screwdriver and I still couldn't budge it.
With a screwdriver, I couldn't get it to work either. When I did my KDP , I was replacing my fan clutch, and I used an impact gun. It damaged the clutch fan nut, but I didn't care.

If the nut is that tight, you will need the big mouth wrench for the pulley bolts, and the smaller wrench for the nut. Smack it with a hammer, and it should come off. Try heat before might help. The threads will most likely be clean, once removed, unless something screwy went down

See here. https://www.dieseltruckresource.com/...y-92-a-305946/
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Old 02-05-2018, 07:06 PM
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A solid whack with a brass drift will usually make it a simple task to take off. The sharp vibrations usually break the bond.
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Old 02-05-2018, 07:18 PM
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Thanks Pat. I'll try that.
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Old 02-06-2018, 08:53 AM
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Yeah, thanks Pat!
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Old 02-06-2018, 07:15 PM
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I use this tool works great removing and installing
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Old 02-06-2018, 07:24 PM
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Takes any fan off in 2 seconds.
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Old 02-06-2018, 10:17 PM
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I posted a picture of that pneumatic set a while back. It works better than any thing else I have used and best of all you don't run the risk of destroying the nut with an air chisel.

I have had some that still took some taps with a ballpean hammer before the air tool set would take them off.
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Old 02-07-2018, 10:50 PM
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Originally Posted by BigIron70 View Post
I use this tool works great removing and installing
Very true, have used that before as well. Someone sure came up with a brilliant invention.
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Old 02-07-2018, 11:17 PM
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Those pneumatic sets are expensive little buggers. I think I'll make my own. Thanks for the great idea. I'll let you all know how it goes.
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