Question about 2000 Dodge Durango

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Chirping, squealing noise from pulleys

I am thinking its the idler pulley but I haven't replaced it yet so I am not sure.

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Check your pulleys. but if you have a Dayco belt on your truck, sometimes they're noisy. Its just the design. But they're good belts. But I would check the pulley on your water pump first, just in case of bearing wear. That's the best way to start.

Posted on Sep 04, 2009

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Posted on Jan 02, 2017

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Tensioner bolt bottoms out on idler pulley (belt for Poly-V A/C & Idler) on 2000 Nissan Pathfinder SE


Pulleys also wear.
You've changed the belts - a workshop would then change that particular pulley, if asked to do so.

Start your engine, then put a few drops of water onto that pulley. Does the squealing noise disappear? If so, the pulley is slightly worn in the groove - and this happens to all vehicles.

Your option is to either replace that pulley or use a spray-on anti squeal compound.

Generic images below:
belt anti squeal Google Search

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One of the accessory bearings could be going out
(I.E.-alternator,water pump,etc)If the noise is near an idler or tensioner pulley,it could also have a bad bearing.The best thing to do is remove the serpentine belt or release the tensioner pulley so the belt is loose,then you can spin each accessory pulley by hand and listen for the noise.You'll also feel the pulley dragging while you spin it and it might have a ratchety feel to it(in other words,as you're rotating the pulley you'll feel it spin somewhat freely and then it will feel as if its catching on something) If the belt itself is bad,it usually makes a squealing or chirping sound.If your vehicle has a vbelt drive with multiple belts,check the pullies the same way as described above and make sure the belts are all tight.A loose belt normally causes a squealing noise rather than a whining noise.Check your power steering fluid level too because the pump will whine if it gets low on fluid.

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I have a chirping or bearing sounding noise, that I am trying to isolate on my daughters college car. Sound varies with RPM.


Get an inexpensive mechanics stethoscope and put the end on the shaft part of idler pulleys, housing near bearings of alternator and water pump etc.
If that doesn't give clear results, try squirting a little water on the serpentine belt as if runs [a length of small drip irrigation hose works really well to get a little water on the belt]. The water will provide harmless temporary lubrication to the belt and change the sound if it is caused by the belt slipping.

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i dont think is your harmonic balancer that dont make any sound check all the pulleys cose to change the harmonic ba... you havto remove and change your crank pulley along with it

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Fan belt squeaks, changed belt @ tension & idler pulleys still squeals


oh yah have your harmonic balancer cheched because you can change every thing but if the balan. gets out of wack it un alines everything

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I have a 1989 ford f250 v8 i have changed altenator,tensioner,and new belt. I still have a chirping noise. Now what do i check?


Could be that the idler pulley bearing has failed (just replace the idler pulley) but first take a real close look all around the pulley looking for a very small piece of an old belt that has been burned onto it. If anything is on the pulley just clean it real good and the chirping may stop (real cheal fix).

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Making a chirping noise while driving


Most chirping noises are due to bad pulleys on the motor. It's usuually an idler pulley or belt tensioner pulley. May also be the bearing in the alternator. Use a stethescope to check otherwise you can use a rubber hose. Put hose up to one ear and put other end by each pulley. Should hear high pitch chirping.

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So i took my 2006 trailblazer to AutoZone and he tells me its the bearings in the Alternator. I am now in the middle of changing the Alternator and got stuck cause the Coolant Hose is blocking the bottom...


ok easy one for u take belt off and spin the alt pully to see if u hear noise or spin idler pulley to hear noise or any othe pulleys that should help u

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1999 dodge durango 5.9 v8 loud squealing noise from under hood replaced tenison pulley, idler pulley, ac pulley/clutch assembley,and belt please help


You didn't mention the alternator, power steering pump, or water pump. In fact, any pulley other than the crankshaft one can have a bad bearing or dry seal. Remove the belt and spin each pulley while listening for any rough noise or squeal. If it was the crankshaft, it might be time to check the oil. Start the engine with the belt off to see if it does squeal. Make sure the noise isn't coming from the radiator fan(s).

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