Fan clutch nut size

Lonewolf182 · Sep 20, 2020

I've swapped a half dozen water pumps on these idi's but this one's killing me.

I'm going to try a loaner fan clutch holder, as soon as i can come up with the deposit.

I want to check on a wrench to fit that nut while I'm at it. Anyone know what size it is?

Detroit80 · Sep 20, 2020

I did mine without the holder...just got a monster crescent or pipe wrench on it, then smacked the handle a few times with a 5lb sledge. I don't remember exactly what I used, as it was several years ago that I had last had it off, but I know I never had the holder tool for it.

Lonewolf182 · Sep 20, 2020

I've never had a holder tool either..
Usually (and this time) cut a leg off an old pair of jeans, roll it up and wedge it between the belt and pully. No luck even with a roll on each belt.
Tried a block of wood, ruined the alternator belt.
Tried the large screw driver trick. Now i can screw around corners.

I normally use a big honking set of channel locks on the nut, but i think I'll need something i can get a long cheater on this time.

Biggest open end i have is 1 1/2". Not enough.

hacked89 · Sep 20, 2020

1 and 7/8 is the exact size.
If you don't have that you can also use 47mm.

I have tested belts on, belts off, pulley holders, etc.

Fastest way, like under two minutes for me is using the correct size wrench, belts on, and mini sledge.
Ive tried it without the belts and I ended up putting the belts back on.

The 1 and 7/8 wrench is big.
Mrs hacked for scale.

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cozinsky · Sep 20, 2020

Yep its 1 7/8". I bought this set years ago and I use it all the time. You can pop them loose in seconds.

https://www.amazon.com/Lisle-43300-Pneumatic-Clutch-Wrench/dp/B000JFJLTC

Lonewolf182 · Sep 20, 2020

Thanks Hacked89
Seems like i did own one that size.
I'll do some more digging.

Thinking about it, I've got some scrap 1/4" and a welder. May try making my own holding tool. Nothing's worked with just the belts.

Lonewolf182 · Sep 20, 2020

cozinsky said:
Yep its 1 7/8". I bought this set years ago and I use it all the time. You can pop them loose in seconds.
[

Nice set, but I've been down and missing out on work for weeks now while i fixed the tranny. Hell, I'm not even sure i can afford to replace the alternator belt right now.

IDIBRONCO · Sep 20, 2020

cozinsky said:
I bought this set years ago and I use it all the time. You can pop them loose in seconds.

Air power. The ONLY way to go!

Lonewolf182 · Sep 22, 2020

What a day. Came up with some $ and the best deal i could find on the wrench was a set of 6 jumbo wrenches from Horrible Fright. About $50 after coupon s and taxes.

I found a rod bending tool i made a while back and tried using it.
Here are the before and afters.

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Lonewolf182 · Sep 22, 2020

Had better luck on the next try.
Took a piece of 2" x 3/8" bar stock and cut it 20 inches long. Next i went to one end and drilled a 3/8 hole centered a 5/16th x 5/16 from the corner.
I took one bolt out of the pulley and found another one a 1/2" longer. That way i wouldn't risk the stock bolt and it could be run deeper into the pulley.

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Lonewolf182 · Sep 22, 2020

I placed 3 washers between the bar and the pulley. That way the bolt could be snugged up without damaging the rim of the pulley. The lenght let the other end of the bar rest against the drivers side frame giving me two hands to use on the wrench.
1st shows it in the truck, 2nd pic gives a better idea of how it works.

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Lonewolf182 · Sep 22, 2020

I wasn't taking any chances this time so i broke out the map gas, heated the nut and used a 1 1/4" box end wrench as a cheater bar like this.

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Lonewolf182 · Sep 22, 2020

Got the SOB this time! The bar also helped get the rest of the bolts out of the pulley. Just flipped it over and pulled the other way against the wrench.
This things earned a coat of paint and a place in the "special" tool box.

One more thing i like to do while replacing a pump is to take a box and use a Philips screwdriver to poke holes in it roughly matching the bolt pattern of the pump. Then just stick the bolts in the box as i pull them. Makes putting them back in the right place easy.

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Fan clutch nut size

Lonewolf182

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Detroit80

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