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Old 06-15-2012, 09:42 PM   #1
locknut550
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Alternator squealing

Hello all, started hearing a squeeling noise under the hood of my Focus. I could tell it was in the pulley/ belt area but but it was hard to tell which pulley was squeeling, so I got some wd40 and shot some BEHIND the pulley at the alternator and the squeeling went away for about 20 sec. Then it came back.I did that 2 more times with the same results. My question is do you think its my alternator going bad maybe a bearing in it or something?Can a alternator squeal when a bearing is going out?ps It has a brand new serpentine belt. Thanks


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Old 06-16-2012, 05:41 AM   #2
poppop
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My car had the same symptoms and results-turned out it was a bad belt tensioner.
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Old 06-16-2012, 06:22 AM   #3
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First off, stop spraying WD-40 on your alternator. Try replacing the belt, while the belts off, turn the pulleys by hand. That should help you figure out which one it is. Most likely it is the tensioner.
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Old 06-16-2012, 08:42 PM   #4
mhound
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Just went thru the same thing, it was the belt tensioner.. The exact same problem can be the idler pulley. You may as well replace them at the same time because at least in my car (2001 focuse se wagon dohc cam) it was very hard to tighten the bolts for the tensioner, unless I first removed the Idler Pulley which blocks access.
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