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Belt Noise

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Old Jun 22, 2025 | 10:17 PM
  #1  
R0xanne's Avatar
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Car: 1984 Pontiac Trans Am
Engine: 5.0L L69 H.O.
Transmission: 700-R4
Axle/Gears: 3.73
Belt Noise

Around six or so months ago I went and re-did all of my belt system with a new P/S Pump, W/P, Alternator, dress-up-kit, the whole shebang.

Only issue is, the constant whine it makes hasn't subsided and its been driving me crazy these past few days now that ive been starting to drive it more.

Could I get a second opinion on this noise?

https://youtu.be/AQYRWhUD6Ak?si=DwpubwGJnx7u92F3

I'm thinking all I have to do is tear off the pulleys and repack the bearings in the accessories with grease, but better to run it through the 'wise and knowledgeable sages of the forums' first, thanks.
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Old Jun 23, 2025 | 07:02 AM
  #2  
ratfink6923's Avatar
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From: Tampa, FL
Car: 15 Ram, 88 IROC, 92 RS
Engine: 5.0
Transmission: Auto
Axle/Gears: 3.42 (4th Gen)
Re: Belt Noise

The bearings in your accessories are all going to be a sealed design, non-serviceable. I would pull the alternator belt restart and see if the noise goes away. Or, stethoscopes are cheap. Use the stethoscope to isolate which bearing it is it's making noise and replace that accessory
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Old Jun 23, 2025 | 09:16 AM
  #3  
R0xanne's Avatar
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Car: 1984 Pontiac Trans Am
Engine: 5.0L L69 H.O.
Transmission: 700-R4
Axle/Gears: 3.73
Re: Belt Noise

I was really hoping that wasn't the case but it makes sense, tonight ill go through and isolate the noise.

Appreciate it man, take care.

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Old Jun 23, 2025 | 09:35 AM
  #4  
ratfink6923's Avatar
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From: Tampa, FL
Car: 15 Ram, 88 IROC, 92 RS
Engine: 5.0
Transmission: Auto
Axle/Gears: 3.42 (4th Gen)
Re: Belt Noise

Report back with your findings please. Happy to help
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Old Jun 23, 2025 | 06:02 PM
  #5  
R0xanne's Avatar
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Car: 1984 Pontiac Trans Am
Engine: 5.0L L69 H.O.
Transmission: 700-R4
Axle/Gears: 3.73
Re: Belt Noise

I feel so stupid man...

Used the old screwdriver trick (ill get a stethoscope sooner or later) and heard bearings noise from the alternator, so I take off the belt and the noise is gone.

Turns out, the reason it has bearing noise is because its misaligned with the Crank and W/P pulley because the dress-up-kit Alternator bracket pushes it backwards at an angle and I only just now noticed it...



Re-bent and readjusted the bracket and alternator and I can hear my engine again, I appreciate your time though man, sorry to waste it.


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Old Jun 23, 2025 | 06:03 PM
  #6  
ratfink6923's Avatar
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From: Tampa, FL
Car: 15 Ram, 88 IROC, 92 RS
Engine: 5.0
Transmission: Auto
Axle/Gears: 3.42 (4th Gen)
Re: Belt Noise

Never a waste, especially when the solution is found! Glad it was relatively simple. Thanks for the update
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