Fan belt rant

lemondana · Aug 31, 2025

All of these belts that all of you are having problems with are not the correct width belts. The belt is supposed to be flush with the top edges of the pulleys. I know-that's all you can find. All of the Mopars and GM's back in the day used the narrow 13 series belts with a few 17 series for the single AC belts.

Kern Dog · Sep 1, 2025

themechanic said:
The FSM mentioned a tool used to tighten fan belts. This guy made some to sell and uplaoded a video of the tool in use.

Pretty cool.

http://[URL]http://www.simplexco.com/auto/altbelt/1.html
[/URL]

In one of the many parts stashes that I took in over the years, in one of them was a factory-ish alternator belt adjustment tool like that. It works quite well.

themechanic · Sep 1, 2025

lemondana said:
All of these belts that all of you are having problems with are not the correct width belts. The belt is supposed to be flush with the top edges of the pulleys. I know-that's all you can find. All of the Mopars and GM's back in the day used the narrow 13 series belts with a few 17 series for the single AC belts.

Not true in my case.

themechanic · Sep 1, 2025

Kern Dog said:
In one of the many parts stashes that I took in over the years, in one of them was a factory-ish alternator belt adjustment tool like that. It works quite well.

I ordered one. No more guessing and burning up bearings by overtightening belts.

Lefty71 · Sep 1, 2025

themechanic said:
I ordered one. No more guessing abd burning up bearings by overtightening belts.

Everyone should have one of these as well. If you dont have the specific info for your belt in particular, you use the size and type guide included with the tool. Too loose causes slips and squeals, too tight causes bearing damage and premature failure.

https://www.supplyhouse.com/Emerson...MIgu7Mx-O3jwMVC1B_AB2SDSYlEAQYASABEgJoyfD_BwE

tommytunes · Sep 7, 2025

Order from Mancini Racing in Detroit. should take care of your problem.
No junk.

themechanic · Sep 7, 2025

tommytunes said:
Order from Mancini Racing in Detroit. should take care of your problem.
No junk.

Solved by using Gates belts.

It was the power steering belt, by the way.

AR67GTX · Sep 7, 2025

My power steering belts on my 66/67 are supposed to be 17-series belts. Fan, and double AC belts on the 67 are supposed to be 15-series.

Fan belt rant

lemondana

Well-Known Member

Kern Dog

Life is full of turns. Build your car to handle.

themechanic

Oklahoma is OK

themechanic

Oklahoma is OK

Lefty71

Well-Known Member

tommytunes

Well-Known Member

themechanic

Oklahoma is OK

AR67GTX

FBBO Gold Member

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