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Jeep serpentine belt squealing after replacement

2 messages,  Last post on Jan 11, 2011 at 11:13 AM

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#1 of 2 JEEP SERPENTINE BELT SQUEALING LOUD AFTER REPLACEMENT by dmbass

Apr 22, 2010 (11:55 am)

Replaced serpentine belt at suggestion from service tech; belt worn and beginning to crack. No other signs that belt was in need of being replaced. Replaced belt-horrible squealing upon starting ignition. Could not use air conditioner or defrost. Service tech adjusted tension on belt and used belt dressing; it improved a bit. Two days later, same problem. Service tech has made adjustments several times and even replaced belt. Same problem. Took Jeep to a mechanic who replaced belt with so-called better belt. Worse than even before. Suggestions have been that it could be the compressor or water pump going out, idler arm pulley and/or various other pulleys. I cannot understand it being the compressor as the squealing is immediate and loud upon starting Jeep and compressor not running. Any ideas? Running out of mechanics at this point, and getting to be a rather expensive ordeal.

#2 of 2 Re: JEEP SERPENTINE BELT SQUEALING LOUD AFTER REPLACEMENT [dmbass] by mrr0811

Jan 11, 2011 (11:13 am)

Replying to: dmbass (Apr 22, 2010 11:55 am)
I know this is a bit late, but something you might take a look at the pulleys themselves. Once a serpentine belt has slipped several thousand times, it causes the pulleys to glaze over a bit, resulting in the same problem over and over again with new belts. You could try taking a low-grade abrasive, like steel wool, to the pulleys to 'de-glaze' it, and see how that affects it... if that's where the problem is actually coming from.

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