Question about 2000 Hyundai Sonata

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I have a 2000 Hyundai Sonata. I have been told that my idler pulley needs to be replaced. It squeals when first started up, but stops if I am driving continuously. Is it necessary to replace it? Is there an alternative?

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You should replace it along with a new belt, or risk getting stranded

Posted on May 07, 2010

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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

Mar 09, 2016 | 2000 Nissan Pathfinder

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I just replaced power steering pressure hose on a 2002 Hyundai Sonata GLS 6 cylinder. Now its s squeals really bad when I turn the steering wheel and the belts are squealing like mad too what do I need to...


Looks like you need a new belt. Inspect the belt for any sign of damage like cracks etc. If belt appears fine then just tighten it. Add few drops of brake oil on pulley (surface which comes in contact with belt) to stop minor squeals if left after tightening the belt.

Dec 18, 2012 | Cars & Trucks

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Squealing from the engine when started, but not for long, after driving or reving the engine it stops whats going on


the bearings on the idler pulley need to be oiled when the engine is warm the bearings start to move esier due to the amount of torque they are under if it still squeals after oiling you may need to replace the pulley. if you replace the pulley repace the belt with it, so you won't need to pull it apart for a second time.

Jun 30, 2011 | Volkswagen Eurovan Cars & Trucks

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When I raise the hood and with motor running looking to my left there is a belt running and a squeaking noise at idle coming from that area. The van is front wheel drive so motor sits in there sideways.


Has it just started with cold weather? Does it squeal at first then as the engine is revved, stop squealing.

If so its probably your alternator belt has worked loose and needs tightening. I'd check this out first, if you've not done it before ask a friend with some know how for guidance. But as a guide, there should be about an inch of give when flexed on the longest run between 2 pulleys, if more then probably needs tightening. If more than a couple of years old, replace with a new one.

If it still squeals after tightening/replacing, you could have a faulty water pump bearing or pulley bearing. Either would require replacement to pre-empt catastrophic failure and resultant engine damage.

Dec 20, 2010 | 1998 Oldsmobile Silhouette

1 Answer

I have a 2001 Sonata. I have a squeeling pulley.


It sounds like you have a worn or streched belt making the sqeeling noise. Whenever you turn on a
device in the car that draws a fair amount of voltage
ie. a/c or headlights it will cause increased drag on
the alternator and if you have a loose/worn or glazed
belt, it can slip around the pully making the squeel.
To adjust the alt-a/c belt loosen the mounting bolts
on the tensioner, then use the adjuster bolt behind
the tensioner pully to loosen and tighten the belt.
Be sure to check the belt for cracks bald spots etc.
While the belt is loose spin the pullys to make sure
they all spin freely. Also I would replace the belt just
to be sure. Hope this helps

Jul 04, 2010 | 2001 Hyundai Sonata

1 Answer

How do i change the water pump on 2004 sonata 4 cylinder?


Hyundai Car 1999-05 - Removal & Installation
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
    Negative battery cable Accessory drive belts Water pump pulley Timing belt, tensioner and idler pulley Water pump
To install:
  1. Clean all mating surfaces of any residual gasket material.
  2. Install or connect the following:
    Water pump with a new gasket and torque the bolts to 16 ft. lbs. (22 Nm) Tensioner and timing belt and idler pulley Water pump pulley and drive belts Negative battery cable
  3. Fill the cooling system to the proper level.
  4. Start the vehicle, check for leaks and repair if necessary.
c84998b.jpg

Fig. Water pump assembly-1.8L and 2.0L engines

9eb0fb7.jpg

Fig. Exploded view of the water pump assembly and related components-2.0L engines


Hope this help; TY for using Fixya (remember comment and rated this).

Mar 31, 2010 | Hyundai Motor 2004 Sonata

2 Answers

Air Conditioning


Be carefule of hot parts and rotating/moving belts and pulleys.

If its a whine, most likely the bearings on the idler pulley or the bearings on the ac compressor clutch.
-To trouble shoot with engine running and ac on spray wd40 on bearing area of clutch then wait a few seconds to see if sound goes away. If not then try bearing area(behind bolt of pulley) of idler. This will work as temporay fix, but ultimatly you must replace bad bearing.Do NOT spray on belt or pulley surface.

If its a squeal could be the belt is loose and needs to be replaced or dressed.
-Belt dressing can be spray directly on belt while engine is running and ac is on.

Feb 25, 2010 | Hyundai Motor 2002 Sonata

1 Answer

Loud knock and squeal on 2003 santa fe


no its not a hard job at all www.alldatadiy.com and www.autozone.com also here is Drive belt diagram www.webcrawler.com wish you the best of luck Michigan Man.

Jan 12, 2010 | 2003 Hyundai Santa Fe

1 Answer

Rattling from the engine when I start the 2006 V6 Sonata


Do you have the air conditioning on when you hear this rattle? If so, it could the clutch for the a/c compressor. You may also want to check the status of the idler pulley on the serpentine belt. Hope this helped and best wishes.

Jul 31, 2009 | 2006 Hyundai Sonata

1 Answer

Have a 2005 Hyundai Sonata and for the last year it has a high pitch squeak almost always when the engine is running. I had it into the shop three or four times and they tried to get the squeak to stop....


Occasionally this will happen. Here are a few tricks to hush the noisy belt. Try using another belt from another manufacturer. Its true you do get what you pay for. A better belt may be the ticket. Another trick is to lightly score the idler pulley with a file all the way around in a cross pattern then lightly sand the pulley to rough up the surface. There is also a spray you can buy called belt dressing that will work. Hope this gives you a reprieve from your earplugs. Good luck Dena.

Jun 03, 2009 | 2007 Hyundai Sonata Limited Sedan

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