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II changed my belt last month because it was squealing. I thought it was the tensioner but the noise went away. Then three weeks ago I washed my engine top to bottom and I got it wet and now it squeals even louder. Is there anyway to check the tensioner for noise?
 

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Which tensioner? The serpentine belt tensioner? It won't hurt the engine if you remove the serpentine belt and run the engine for a minute. If no squealing, you've identified the area.
 
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