Vintage air

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Old June 22nd, 2018, 06:11 PM
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Vintage air

I have a squeal on my a/c belt that I can’t get rid of. Any suggestions? 72 olds cutlass


















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Old June 22nd, 2018, 06:14 PM
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I’m using Napa 7555 v belt. This is my 3rd belt.
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Old June 22nd, 2018, 06:23 PM
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Check all you pulleys for a nick or bend. something is tearing you belt
insure belt is sitting down in pulleys
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Old June 22nd, 2018, 06:39 PM
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Originally Posted by My2nd 69 442
Check all you pulleys for a nick or bend. something is tearing you belt
insure belt is sitting down in pulleys
I’ve checked the belts,they are sitting correctly. I’m beginning to think it’s the crank pulley. It’s the only belt squealing. It squeals when I turn on the a/c and mash the gas.
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Old June 22nd, 2018, 07:32 PM
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Could you have a V groove mismatch or the wrong spec belt or both?

The belt needs to be the correct OEM size/spec. I am describing the depth and profile of the V shape. Most of the big box house of chineasium parts stores only have GP junk belts. They don't have enough "meat" in the V area.

What happens is the belt is only making good contact with the pulleys at the very top of sheaves versus gripping the whole V shape of the groove like the OEMs. That looks like what your belt is doing.

The pulley on the aftermarket pump could have the wrong size V groove, and is not compatible with the Olds OEM pulleys??

Check with Year One or Fusick for the right spec belt. The other problem could be an overcharged system. That will make the pump harder to turn. Check the belt spec first then see what the high side pressure is doing.

Have you discussed this with Vintage Air?
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Old June 22nd, 2018, 07:58 PM
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Originally Posted by droldsmorland
Could you have a V groove mismatch or the wrong spec belt or both? No I haven’t called vintage air. I’m going to look into the system being overcharged. I have the exact same size that’s on the vintage air paperwork. I can say that the belt sits down in the groove a tad and that could be the reason it’s not gripping when I give it gas.

The belt needs to be the correct OEM size/spec. I am describing the depth and profile of the V shape. Most of the big box house of chineasium parts stores only have GP junk belts. They don't have enough "meat" in the V area.

What happens is the belt is only making good contact with the pulleys at the very top of sheaves versus gripping the whole V shape of the groove like the OEMs. That looks like what your belt is doing.

The pulley on the aftermarket pump could have the wrong size V groove, and is not compatible with the Olds OEM pulleys??

Check with Year One or Fusick for the right spec belt. The other problem could be an overcharged system. That will make the pump harder to turn. Check the belt spec first then see what the high side pressure is doing.

Have you discussed this with Vintage Air?
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Old June 22nd, 2018, 08:01 PM
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Vintage air

Where can I purchase an OEM belt?
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Old June 22nd, 2018, 09:58 PM
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Give Rock Auto a try. You’ll find discount codes on this site
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Old June 23rd, 2018, 07:22 AM
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Let's back up. Do you KNOW it's the A/C belt? Squealing is usually caused by the PS pump belt. Temporarily remove the A/C belt and see if it still squeals.
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Old June 23rd, 2018, 07:50 AM
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Originally Posted by joe_padavano
Let's back up. Do you KNOW it's the A/C belt? Squealing is usually caused by the PS pump belt. Temporarily remove the A/C belt and see if it still squeals.
Yes it’s the ac belt when I switch it on it goes haywire..
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Old June 23rd, 2018, 08:34 AM
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Originally Posted by kbdecatur
Where can I purchase an OEM belt?
Year One or Fusick.

https://www.yearone.com/Catalog/1964...elts-.-v-belts

https://www.fusickautomotiveproducts...s.asp?dept=151

Dont see it call their phones
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Old June 23rd, 2018, 12:30 PM
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V belts ride on the sides of the belt. If it bottoms out in the groove it will squeal.
The edges of your belt look bad too like the pulleys aren't aligned or are riding too low. I prefer to see my V belts either flush with the outer edge of the pulley or just proud of it.


In your case I would go with the next wider size. This will require I resizing check of the belt.
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