2nd Generation Specific 1986-1992 Discussion

Alternator belt keeps snapping

Old 09-08-2011, 12:30 PM
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Hi all, my alt belt keeps snapping. Is this because the bearing in the alt is fubar or because i have it too tight ??

the alt is working fine but the pully seem's to be sticking as the the belt snaps following a burning smell
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Old 09-08-2011, 12:45 PM
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first off are you still running the smog pump? Are you actually watching the alternator seize or are you just assuming that's what's happening?
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Old 09-08-2011, 01:02 PM
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yep still running the smog pump and no i haven't actually seen the alt seize

could it be the water pump seizing ?
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Old 09-08-2011, 02:00 PM
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Originally Posted by FCme View Post
yep still running the smog pump and no i haven't actually seen the alt seize

could it be the water pump seizing ?


Do all of the pulleys line up? I mean there's nothing misaligned or anything is there? Have you turned all the accessories by hand to make sure nothing sticks?
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Old 09-08-2011, 03:37 PM
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whats the other accessories got to do with the alt belt ?? and nope there's nothing obstructing it
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Old 09-08-2011, 03:56 PM
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Originally Posted by FCme View Post
yep still running the smog pump and no i haven't actually seen the alt seize

could it be the water pump seizing ?




Originally Posted by FCme View Post
whats the other accessories got to do with the alt belt ?? and nope there's nothing obstructing it


You tell me, you mentioned the water pump I was merely asking if that stuff was spinning freely.
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Old 09-08-2011, 04:01 PM
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Can you spin the alternator pulley when the belt is removed? Do you feel it spin smoothly or is it hard to turn?
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Old 09-08-2011, 04:05 PM
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The only time I've ever had issues shredding belts is on a seized accessory of some sort, in this case I am referring to anything driven by a belt as an accessory, it's usually pretty obvious and it lets out a pretty good squeal before it shreds.



AS far as belts just snapping, the only time I have seen that happen, without the previously mentioned symptoms is from the belt being way over tightened. SOOO, my guess would be you are either tightening the belt way to tight or the alternator is randomly locking up, which I guess is possible.
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Old 09-08-2011, 04:11 PM
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yea it spins freely and seems to be locking up randomly

Is that the result of a bad bearing and if so can it be replaced ?
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Old 09-08-2011, 04:17 PM
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Originally Posted by FCme View Post
yea it spins freely and seems to be locking up randomly

Is that the result of a bad bearing and if so can it be replaced ?


You could rebuild the alternator, although it would probably be easiest just to replace it.
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