Alternator Squeal
#1
Alternator Squeal
The alternator on my truck makes a squealing sound, like the sound of a belt squealing. I removed the altrernator and there isnt any play in the pully and I cant replicate the noise (it only occurrs at over 2k rpm) Is there a replaceable part in there like a bearing? The truck is a 89 22re and the alt is a toy part so it could be the original. Oh ans I know it is the alt as it made the sound with that being the only belt driven thing then after removing the belt, no noise. There isnt a tensioner pully either, so it has to be the alt. thanks.
#3
Registered User
If it's belts, this is pretty normal for the 3vze. What's happening is that you have multiple belts running over the same pairs of pulleys and wearing at different rates. This causes one to have to run on different radii = travel different distance = squeal.
Answer is to replace the belts in pairs.
That's assuming it's belts and not a bearing going out.
If you squirt a little soapy water on the belts and it quiets down you'll know it's belts.
Answer is to replace the belts in pairs.
That's assuming it's belts and not a bearing going out.
If you squirt a little soapy water on the belts and it quiets down you'll know it's belts.
#5
Registered User
He has a 22RE. Here is my experience with a noisy alternator on my 22RE:
https://www.yotatech.com/forums/f116/electrical-gremlins-88-pickup-please-help-83641/
Skip down to the bottom.
Rob
https://www.yotatech.com/forums/f116/electrical-gremlins-88-pickup-please-help-83641/
Skip down to the bottom.
Rob
#6
Well I am unsure now. I did replace both belts at the same time and with only the alt belt on, the noise was still there. The belt was probably not tight enough, but it wasnt obviously slipping or stuck. It looked fine with the motor running. I also didnt think it was the belt because the noist was way to consistent. Began at exatly the same rpm (2800) and now at 2200. And damn, the stupid thing is on my workbench so I dont know if I just re-install and tighten better, or change the bearing or the whole alternator. Also, the squeal was identical with the old belt and new. The old one was really bad, cracked and missing teeth. That is also why I didnt think belt. Oh well. Not sure what to do now.
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#8
Contributing Member
Or if you can afford to be without the truck for a week or so, send it to Boyle Future Technology in California and have it rebuilt and upgraded (mine went to something like 140A) for about $100.
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09-20-2015 09:00 AM