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Old 07-31-2020, 12:47 PM   #1
White142
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Squealing noise coming from pulley

Moved across the country around 8 months ago and is now parked outside 24/7 about 500 feet from the ocean. Car used to make weird noise and I browsed the forums and figured it was the belt. Replaced the belt last week and now the noise is worse than ever. It begins at around 2000 RPM it gets worse as it goes up. I lifted the hood up and had a friend rev the engine and the pulley for the A/C compressor is seizing up. Putting 2 and 2 together I figure that the noise is the belt running over the seized pulley.

Anyone have any guesses on what caused this problem and how I can fix it?
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Old 07-31-2020, 02:02 PM   #2
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Originally Posted by White142 View Post
Moved across the country around 8 months ago and is now parked outside 24/7 about 500 feet from the ocean. Car used to make weird noise and I browsed the forums and figured it was the belt. Replaced the belt last week and now the noise is worse than ever. It begins at around 2000 RPM it gets worse as it goes up. I lifted the hood up and had a friend rev the engine and the pulley for the A/C compressor is seizing up. Putting 2 and 2 together I figure that the noise is the belt running over the seized pulley.



Anyone have any guesses on what caused this problem and how I can fix it?
Tighten the belt?

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Old 07-31-2020, 04:50 PM   #3
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Originally Posted by White142 View Post
Moved across the country around 8 months ago and is now parked outside 24/7 about 500 feet from the ocean. Car used to make weird noise and I browsed the forums and figured it was the belt. Replaced the belt last week and now the noise is worse than ever. It begins at around 2000 RPM it gets worse as it goes up. I lifted the hood up and had a friend rev the engine and the pulley for the A/C compressor is seizing up. Putting 2 and 2 together I figure that the noise is the belt running over the seized pulley.

Anyone have any guesses on what caused this problem and how I can fix it?
Hi ya, White142 and welcome to our forum -

As ol p1l0t mentioned, your first thing to try would be to tighten up the belt using the adjustment on the idler pulley.

While you have the idler pulley loosen up, you may wish to check to see if the pulley on the AC compressor runs free.

Try those things then come back.
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Old 07-31-2020, 05:19 PM   #4
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Hi ya, White142 and welcome to our forum -

As ol p1l0t mentioned, your first thing to try would be to tighten up the belt using the adjustment on the idler pulley.

While you have the idler pulley loosen up, you may wish to check to see if the pulley on the AC compressor runs free.

Try those things then come back.
Do you have a guide or video on how to tighten the belt?
Thanks for your help.
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Old 07-31-2020, 06:15 PM   #5
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Do you have a guide or video on how to tighten the belt?
Thanks for your help.
You may find these helpful:

https://www.ft86club.com/forums/showthread.php?t=10227

"Turn the adjustment bolt on the side, top or bottom of the pulley counterclockwise with the ratchet and socket until the accessory belt is loose enough to remove. Tighten the tensioner pulley by turning the adjustment bolt clockwise with the ratchet and socket until the belt is tight."

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Old 08-02-2020, 12:25 AM   #6
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There is no accessory belt adjustment. None. If there's a squealing-screeching sound and it's not from the alternator right after a cold start, something is seriously wrong.
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Old 08-02-2020, 12:55 PM   #7
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sounds like you need a new a/c compressor-- either the pulley assembly, or the entire thing.
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Old 08-02-2020, 11:40 PM   #8
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There is no accessory belt adjustment. None. If there's a squealing-screeching sound and it's not from the alternator right after a cold start, something is seriously wrong.
Fixed it (I hope). Took off the new belt and wiped pretty much all the surface rust off pulleys and put the OLD belt that I replaced back on. No noise at all after driving around for an hour. I don't know if it was the new belt or the rust but I guess it's fixed now. The new belt in question is some continental rubber one I got on AutoZone; maybe it wasn't the correct size or something? I will be ordering an OEM belt to replace the old one that's on currently on since it is a little rough in the first place.
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Old 08-03-2020, 12:42 AM   #9
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Fixed it (I hope). Took off the new belt and wiped pretty much all the surface rust off pulleys and put the OLD belt that I replaced back on. No noise at all after driving around for an hour. I don't know if it was the new belt or the rust but I guess it's fixed now. The new belt in question is some continental rubber one I got on AutoZone; maybe it wasn't the correct size or something? I will be ordering an OEM belt to replace the old one that's on currently on since it is a little rough in the first place.
Wrong size could definitely do it... it is a possibility.

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Old 08-03-2020, 01:18 AM   #10
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Fixed it (I hope). Took off the new belt and wiped pretty much all the surface rust off pulleys and put the OLD belt that I replaced back on. No noise at all after driving around for an hour. I don't know if it was the new belt or the rust but I guess it's fixed now. The new belt in question is some continental rubber one I got on AutoZone; maybe it wasn't the correct size or something? I will be ordering an OEM belt to replace the old one that's on currently on since it is a little rough in the first place.
If the belt was too long, that would do it. Would be much easier to install, though.
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Old 08-03-2020, 02:46 AM   #11
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There is no accessory belt adjustment. None. If there's a squealing-screeching sound and it's not from the alternator right after a cold start, something is seriously wrong.
Oh? How does one adjust (change) the tension on the accessory belt?

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Old 08-03-2020, 05:10 PM   #12
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Oh? How does one adjust (change) the tension on the accessory belt?

One does not. Tension is maintained automatically.
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Old 08-03-2020, 06:10 PM   #13
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One does not. Tension is maintained automatically.
WOW! Ol @Ultramaroon schooled old humfrz ..... again -

Sorry, @White142 for me putting out bad info -

Self adjusting, what won't they think of next! -

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Old 08-03-2020, 09:02 PM   #14
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How does one adjust (change) the tension on the accessory belt?
Part number 6 on the page below is a spring loaded tensioning pulley. Not quit as big an improvement as the electric starter but close.

https://www.sparksparts.com/auto-par...d-pulleys-scat


@White142 Maybe get a spray can of fan belt dressing. With the engine idling CAREFULLY squirt some on the belt surface that contacts the pulleys. This helps eliminate any glazing on the belt and will instantly eliminate belt squeal.
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