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Old 03-13-2007
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Stupid Squealing Noise Won't Go Away!

Truck: 98 3.0L 4x4 with Air Conditioning

I have a problem with my belt and pulley system squealing. I have tried the following:

1. Replaced Crank Shaft, Alternator, and Water Pump Pulleys with Underdog Pulleys
2. Replaced belt with appropriate length Gator Back Belt
3. Replaced Tensioner Pulley and Bearing
4. Replaced Idler Pulley and Bearing

Conditions:
1. The squealing noise level and frequency changes with engine RPM
2. The squealing noise is not present when the belt is removed

It obviously is not effecting how the truck performs, however, it is very annoying. Does anyone have any idea what it might be and more importantly how I can diagnose what it is?

I had an idea to attach a pulley to my electric drill and then run a belt between that pulley and each pulley on my truck separately to identify the squealing pulley. Do you think that would work?

Thanks,

Marc
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Old 03-13-2007
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ttt
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Old 03-13-2007
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i had the same problem but all i did was replace a worn washer!
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Old 03-14-2007
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Which washer was worn?
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Old 03-14-2007
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Dang, you've done everything I would have! I would have thought the idler pulley/bearing was the problem.

Was the noise there before the UD pulley installation? Sometimes aluminum pulleys will make a little noise until they are "broken in".
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Old 03-14-2007
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The problem did exist before the aluminum pulleys were added. It sounds different every time I drive the truck. Sometimes its loud. Sometimes its non-existent.
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Old 03-14-2007
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mine usually sqeeks when its wet out like today.... i cant see what woudl make yours squeek with all youver replaced... maybe have the dealer check it out... only 40$ and youve already put so much money into it you might as well...
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Old 05-04-2007
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Bump...having the same issue
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