Question about 1992 Pontiac Sunbird
After 2 belts you should know about how to set the timing marks. With a 17 year old car, the water pump bearing and the belt tensioner are probably worn. They are the cheaper of the items on the belt. If you have A/C remember if it was on the last 3 times the belt failed. I would not suspect the alternator unless you replaced each one shortly after the belt broke.
If you have A/C, the compressor could have momentarily frozen if too much moisture is in the system.
A backfire can cause the timing to jump and will bust the belt. There have been several people on Fixya with similar cars driving along just fine and for no reason the belt pops. Get a good brand of belt and if somehow possible you see a date on it- go for a newer one that is not dry rotted hanging on a shelf somewhere.
Finally, check the alignment of the pulleys which would be the A/C and Alternator. One misplaced washer can change the track of the belt.
Posted on Jul 02, 2009
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Posted on Jan 02, 2017
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