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Old 12-03-2011, 10:13 AM   #1
JerseyJim
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Default Tighten Fan Belt?

I am installing a fan belt on a 46 engine. Of course, this engine has separate fan and generator belts. My question? How can you apply tension to the belt and tighten it? I can't see anywhere that you could pry against to stretch and tighten the belt. I am of course aware that when tensioned, there should be an inch of deflection mid-span on the belt. I know there must be a simple answer to this that I'm missing.

Any help would be appreciated.
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Old 12-03-2011, 06:33 PM   #2
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Default Re: Tighten Fan Belt?

This is what I use.

Vergil



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Old 12-03-2011, 06:41 PM   #3
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Default Re: Tighten Fan Belt?

Nice pic's vergil, another tool to make. Hey, I like the paint on that flathead what color is it
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Old 12-03-2011, 06:52 PM   #4
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Default Re: Tighten Fan Belt?

Good job on the tool Virgil. G.M.
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Old 12-03-2011, 08:45 PM   #5
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Default Re: Tighten Fan Belt?

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Originally Posted by 39portlander View Post
Nice pic's vergil, another tool to make. Hey, I like the paint on that flathead what color is it


It's actually a grey (Krylon engine paint new Ford Grey) but it doesn't look grey here lol., and thanks.

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Old 12-03-2011, 09:45 PM   #6
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Default Re: Tighten Fan Belt?

Now that is a neat tool to help adjusting the belt. I am going to make one. Thanks
John
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Old 12-04-2011, 01:07 AM   #7
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Default Re: Tighten Fan Belt?

Nifty looking tool Vergil. I always wondered how they did it in the day. I've levered against a block of wood on my F1 with the other end sitting on the chassis. Another method I've tried is straddling the engine with my backside to the firewall and one foot on each chassis rail while I heave with one hand on the fan and tighten the nut with the other. I'm sure it's not a pretty sight (or sound) ...
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Old 12-04-2011, 01:31 AM   #8
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Default Re: Tighten Fan Belt?

My version
Not so nice but it works.
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Old 12-04-2011, 01:42 AM   #9
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Default Re: Tighten Fan Belt?

I tighten the generator/pump belt first by inserting my cresent wrench handle under the generator right against the front bracket so the end is on the intake manifold bracket under the front of the generator (see photo) then push down the end of the wrench to "pry" the generator up as tight as I want the belt and hold it there while tightening the bolt that holds it in place. It takes very little effort with that much leverage. No special jig or tool required. Just simple leverage. That belt is the more critical for tightness since it runs both water pumps and the generator. The fan belt I tighten by just pulling up on the fan while tightening one of the bolts that holds it in place. Again, doesn't take much effort to just lift the fan up. It's not heavy like the generator is. Then I can quit pulling up on the fan and tighten the other bolt. I don't think the tightness of that belt is as critical as the other that I get tighter by "prying" the generator up.
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Last edited by Old Henry; 12-04-2011 at 01:53 AM.
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Old 12-04-2011, 01:54 PM   #10
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Smile Re: Tighten Fan Belt?

Quote:
Originally Posted by Vergil View Post

It's actually a grey (Krylon engine paint new Ford Grey) but it doesn't look grey here lol., and thanks.

Vergil
I like that color. Thanks for the tip Vergil!

Pete
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Old 12-04-2011, 04:07 PM   #11
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Default Re: Tighten Fan Belt?

Vigil, I like a guy that's always thinking, well done on that concept.
I have an engine hoist and use the boom with a rope around the generator and jack it up to correct play then tight it off.
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Old 12-04-2011, 06:15 PM   #12
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Default Re: Tighten Fan Belt?

This is what makes the FordBarn great. A good thread question and an excellent tool idea out of it!

Because of this thread, we should now have a ford barner Tool of the month! Virgil, you got the month of December wrapped up, no pun intended
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Old 12-04-2011, 07:39 PM   #13
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Default Re: Tighten Fan Belt?

Thanks for the help guys.

I love that tool as well Vergil. I'm sure that Ford Service Departments way back when must have had something like this. I'm definitely going to take a spare wrench and make one as well. Went to a late season car show here in NJ today. Several flatheads in attendance. Got a chance to check out the belt setups on several different engines. My engine is a mix of parts from different years. Still don't completely have this sorted out.
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Old 12-04-2011, 09:36 PM   #14
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Default Re: Tighten Fan Belt?

Quote:
Originally Posted by JerseyJim View Post
Thanks for the help guys.
Quote:
Originally Posted by JerseyJim View Post

I love that tool as well Vergil. I'm sure that Ford Service Departments way back when must have had something like this. I'm definitely going to take a spare wrench and make one as well. Went to a late season car show here in NJ today. Several flatheads in attendance. Got a chance to check out the belt setups on several different engines. My engine is a mix of parts from different years. Still don't completely have this sorted out.
Thanks Jim, My setup (2 av8's) is also a little different. I am running one narrow belt driving water pumps and fan, added another pulley by the fan pulley that drives an alternator. Have 2000+ miles on it so far and have not had any problems with it yet but might shred a belt tomorrow. I like the different belt tightening techniques, they all work and it shows how smart the boys here are.


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Old 10-11-2013, 08:37 PM   #15
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Default Re: Tighten Fan Belt?

I know this is an old thread, but I figured I would share how I've been doing it for people searching the archives. I've had good luck putting a punch in the slot and prying up. I put a piece of wood on the intake to keep from scratching it up.
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Old 10-11-2013, 09:10 PM   #16
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Default Re: Tighten Fan Belt?

Quote:
Originally Posted by peewee2you View Post
Vigil, I like a guy that's always thinking, well done on that concept.
I have an engine hoist and use the boom with a rope around the generator and jack it up to correct play then tight it off.
Me too.
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Old 10-11-2013, 10:15 PM   #17
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Default Re: Tighten Fan Belt?

Every time I come to this site I learn something,I've been adjusting mine with a crowbar and a wooden block,I love this place!!!!

Last edited by Thaplumbr; 10-11-2013 at 10:16 PM. Reason: Reread what I posted,
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Old 10-12-2013, 05:25 AM   #18
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Default Re: Tighten Fan Belt?

Thaplumbr......that's what I use. A piece of oak carved out to catch on a bolt head and use my crowbar to pry up the alternator. Vergil that is sweet what you made up !!

Mike
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Old 10-12-2013, 09:25 AM   #19
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Default Re: Tighten Fan Belt?

Vergil's tool inspired me to make this fulcrum. It works great!
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Old 10-12-2013, 10:49 AM   #20
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Default Re: Tighten Fan Belt?

Ross....Have that chromed,and leave it on the truck...I like it..
I was going to post a photo of my "Bloody Knuckle" that happened the other night when the bar slipped....Walking through the house to get a band aide,she asked me "What did you do this time??".....I'm building one of those today...Carl in SoCal..
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