Question about 2000 Chevrolet Silverado

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Went off roading now have a pulley squealing cleaned it and sprayed lubricant still squealing?

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You should re-clean the pulleys again and dry them, but do not spray any lubricant on the pulleys. This can cause the belt to slip, causing the squealing noise. If that doesn't help, Check to see if the tensioner is bad.

Posted on Oct 16, 2010

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Whatever lubricant is left on the surfaces you sprayed clean it off.

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could be the alternator or the power steering bearings. more like to be the power steering pump if it is the alternator spray some wd40 on the bearing shaft as the engine is running can do this to the power steering pump but it dont usually get to the bearing. unless you spray it in the breather hole on the shaft housing..

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Have you checked the belt for cracks? Also, you never want to use the spray on the belt. If the belt is new, then you want to check the pulleys for dirt or old rubber that melted to the pulley. A good way to clean the pulleys is to remove the belt and use soapy water and a tooth brush and clean each pulley. If you are having a hard time getting all the junk off, you could try using a pick or a screwdriver and CAREFULLY pressing it against each pulley until they are clean. If that doesn't work then you could either have a misalignment of pulleys, wrong belt, or possibly fluids leaking on belt.


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It is either the tesnioner or the belt....easy way to find out is to spray the pulley that has no grooves....that's the tensioner. Spray it with WD-40 or equivalent, in the middle of the pulley. That is the bearing housing. Spray only that first. Start the motor...if it goes away, then you have found your problem. Try not to spray the belt.

If it still squeals, spray the belt with the engine running. If it squeals, replace the belt.

Has anything been done to the motor recenlty? If so, one of the pulleys may be a little off-centered.

Let me know what you find.

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this is a bad belt. i would replace the belts this will fix the squeal. check the pulleys as well.

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Did you take the time to clean all pulleys good with brake clean or similar cleaner, when belt was off? . Sometimes a little antifreeze, or windsheild washer antifreeze can get spilled on the belt(s) and cause that, as well as an oil drip. Take a flashlight & double check that you don't have oil dripping down on there somewhere. Only other thought is that maybe power steering pump working too hard or alternator on it's way out, causing extra load on the belt.

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