Mazda 323,Mazda 626 & Mazda 929 Whether the compact 323, the mid sized 626, or the full sized 929, these vehicles remain very popular even though production has stopped.

323 BJ 1999-model alternator belts keep breaking

Old 11-26-2013, 05:59 PM
Junior Member
Thread Starter
Join Date: Nov 2013
Posts: 1
Default 323 BJ 1999-model alternator belts keep breaking


I have a Mazda 323 BJ 1999-model with automatic gear that eats alternator belts for breakfast. I first busted one alternator belt after it had howled for a long time. After a few months the alternator broke and this was replaced, but only a week later another alternator belt broke. This time a new mechanic tok a look at the car and found out that the alternator wheel was 1.5 mm off, and reckoned that this would solve the problem but now the alternator belt howls again and will break if I continue driving the car. Does anyone have any ideas or experiences which this issue? I have checked my battery but the indicator says its fine and all the belt wheels are good as well.
Old 11-27-2013, 08:56 AM
tanprotege's Avatar
Senior Member
Join Date: Jun 2011
Location: Midwest
Posts: 2,390

Could you tell us in which way the alternator belt is breaking? Is it tearing through, or are the ridges ripped off?
It should be rather simple to get this fixed. But you need a mechanic who looks into every detail:
Every bearing must be checked. The pulleys must be checked for damages or foreign bodies stuck in the grooves. If the belt squeals the sides of the grooves may need a little bit of sanding to improve friction with the belt. Make sure there is no oil or other fluid leaking on the belt or pulleys. The pulleys must be properly aligned, the tension must be set according to the book. You need to mount a top quality belt such as Gates or an original Mazda belt. Make sure the alternator sits perfectly perpendicular to the belt line and is bolted down so it does not move under load.

It would be wrong to overtension the belt in order to eliminate a squeal. The tension is either set with a spring laded tensioner pulley (consider replacing the whole tensioner including the spring) or it is set with an adjusting bolt.

I am sorry, I don't have the exact amount of deflection handy. Your mechanic should look it up.
I cannot think of anything else that could cause early belt failure.

Last edited by tanprotege; 11-27-2013 at 09:14 AM.
Old 11-30-2013, 07:00 AM
Juanky's Avatar
Senior Member
Join Date: Nov 2013
Posts: 216

the pulley was off by 1.5 mm. did he fix that? how? if the fix was to put on a narrow belt to keep it from rubbing on the edges, that wont work. the grooves will still be off and the belt will break. check that you dont have a washer missing or something. or you might be able to get it back in alignment by using a washer behind the pulley

Last edited by Juanky; 11-30-2013 at 07:06 AM.
Related Topics
Thread Starter
Last Post
New Member Area
10-14-2009 11:25 AM
Mazda MPV
10-08-2009 11:13 AM
Mazda Protege
03-11-2009 09:34 PM
Mazda 323,Mazda 626 & Mazda 929
08-31-2008 09:11 PM
Mazda 323,Mazda 626 & Mazda 929
02-01-2007 12:52 AM

Thread Tools
Search this Thread
Quick Reply: 323 BJ 1999-model alternator belts keep breaking

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.