Question about 1998 Mazda Protege

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Alternator belt car is eating up alternator belt, replace with a new belt and get a squealing noise. tried adjusting the tention but same results

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  • ricfigct Jan 15, 2009

    alternator belt has popped 3 times within 4 months changed the alternator also checked tension and still no fix did mazda claim this issue as manufaturer's cause, and if so can they pay my mechanic please help me with this problem ricfigct@yahoo.com

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I had the same problem, repeatedly for more than a year. Turns out that the first time the belt broke and was replaced, something in the piece that the belt raps around was moved very slightly out of line. The mechanic told me that the piece has to eb calibrated perfectly; otherwise the belt will keep loosening and breaking. The piece--I think it was the bracket (or whatever) on the water pumpt that holds the belt onto the pump--was reclaibrated, and, voila! No further problems, at not yet.

Posted on Mar 23, 2009

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Replace the altenator pulley wheel it is worn outside the spec of the belt

Posted on Nov 01, 2008

  • Andy Bathgate
    Andy Bathgate Nov 01, 2008

    its width is now barely gripping the belt from day one and is probably nicely polished

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If the noise sounds like a whistle or squeal, it may be the accessory drive belt slipping. You stated you replaced the alternator and the water pump, but did you replace the belt? Belts may look good even as they age, but they dry out and will get a glazed appearance and this acts like ice on the pulleys. The different accessories (alternator, power steering, A/C. possibly water pump) all provide resistance to the belt as it attempts to turn them. The faster the car runs, the more resistance. Thus, at idle, there may be no noise, but at 40mph, the resistance on one of the pulleys may get so great that the glazed belt starts slipping, causing a noise. This slippage could also be due to a belt that is not properly tight. If your vehicle has an automatic belt tensioner, it could be in need of replacement. If it is manually adjusted, it may need to be readjusted. Be advised, though, re-tightening a glazed belt may make the noise go away, but over-tensioning a drive belt can cause belt breakage or bearing damage to the drive accessories. It is worth the cost of a new belt to not have to replace all the drive accessories.

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