2000 Wrangler chirping. - JeepForum.com
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Unread 05-25-2012, 02:00 PM   #1
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2000 Wrangler chirping.

I hear it when the engine gets up to temperature. It's in the front of the engine. Whenever it's under any kind of load, the chirping quits. (ac running, accelerating). Only happens while idling when hot with no ac running. I believe it's a pulley. Any knowledge of which one is more common to fail? Belt tensioner? Idler?

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Unread 05-26-2012, 06:39 PM   #2
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Any help would be appreciated.
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Unread 05-26-2012, 07:00 PM   #3
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1999 TJ Wrangler 
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The idler pulley and the pulley on the tensioner are good places to start.

While you've got the belt off I would spin the water pump and see if you can feel if that bearing is going bad...

Mine has the same "chirp" its kind of annoying

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Unread 05-26-2012, 10:42 PM   #4
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Other than whats mentioned above. There is a mechanics stethoscope you can buy to help with noises. Two cheap alternatives are using a couple feet of heater hose, use one end to find noise and other end up to your ear. Another method would be with a long screwdriver/pry bar and put tip on parts and handle on ear to listen, sometimes a bar or pipe can work too.

Maybe check the belt too and make sure its tight, not glazed or cracked. Sometimes you can spray a lube on the belt to see if noises go away or change, if so the belt is probably loose or bad.
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