Question about 1990 Isuzu Trooper

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Squeeling noise when running until warmed up

Have replaced idler pully and tensioner assy.. still making noise.but if you pour water over belt noise stops also replaced belt ?

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  • Anonymous Dec 07, 2008

    have a 95 trooper and have same problem/

    replaced all belts and it is actually worse now then before changing them out. Help!

  • Anonymous Mar 22, 2014

    my idear pulley came loose while driving and made a bad noise for a day then stoped like a rock had been thrown out of my engen i took it ot get looked at by a friend whoshowed me that the belt was riping i left it at his house and ordered parts from rock auto we replaced the idler pulley and the belt but now when starting the car the idler pully comes loose very quickly and the belt flys off i dont know what to do they are the same as what i took off?

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Put on belt dressing

Posted on Nov 30, 2008

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May be that your belt is glazed or worn. Try replacing it.

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it is your belt it needs to be replace you can buy belt dressing spray to use but if you have lot of miles I would replace the belt good luck..

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The accessory belt most likely or possibly an accessory belt idler pulley is causing the squealing until the belt warms up enough to stop slipping against one of the pulleys which is causing the noise. Either replace the belt or inspect the tensioner pulley and replace.
You can try to buy "belt dressing" at the auto parts store for a temporary solution. Just spray the belt dressing on the contact surface of the belt it should quiet down for a few days.

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After changed a new water pump,timing belt,idler pully,tensioner for 2004 lexus ls 430, when start engine has a noise look like from pully


COULD BE A BAD BEARING IN THE IDLER PULLY OR THE TENSIONER ON THE TIMING BELT OR THE SERPENTINE BELT. IF ITS A SQUEEL IT MAY BE SOME COOLANT GOT ON THE SERPENTINE BELT. TRY TO WASH THE BELT WITH WATER AND LET DRY COMPLETELY. IF NOISE REMAINS RETURN TO THE SHOP THAT DID THE WORK.

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2004 gmc envoy. has a 6cyl and a serp belt. the center pully off set to the left (i think its a water pump) has a bad wobble and making a horrible noise. Not over heating and no leaks. should i just change...


If the fan is attached to it than it is the water pump making the noise and it will need to be replaced. If the fan clutch is not attached to it than it is either the idler pulley or the tensioner pulley. The tensioner is on the passenger side (left) of the front of the motor.

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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

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Yes, it could also be the tensioner or idler pully making the noise. I would remove the belt and try to turn each pully by hand and at the same time try to move side to side to locate this.

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Sounds like the tensioner bearing is frozen, not turning at all. You need to remove the belt and see if it spins.

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Rattle noise from tensioner and pullys aera when engine is idiling and warm


Take a candle and rub all belts, do NOT get your hands stuck between the belts BE CAREFULL or use silicone spray. Try this first, sometimes the belts dry out and make noise, other wise the idler pully bearing is at fault.

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I have a high pitched noise which appears to be coming from front right engine compartment (as you are looking at the engine) which sounds kind of like a belt that is squealing. It is intermittent. Just...


Could be several things. WHICH ENGINE?.. 4 cylinder (has three belts, power steering/water pump, alternator & A/C compressor, one tensioner pully A/C compressor), The V6 2.7 (has only one belt, 1 Idler pully and 1 tensioner pully), the V6 3.5 has two belts - A/C/alternator, and power steering - there are two tensioner pullys). Noises can be caused by the belt(s) themselves, pullys, bearings, pully bearings, water pump shaft bearings (or belts/pullys rubbing up against something). Let's not forget that there is also belt(s) behind the Timing Belt cover as well as pullys and bearings associated with the timing system. You could start by removing one accy drive belt at a time (alternator, water pump, compressor, power steering, etc) to see whether or not the noise goes away in each case. If after each case, you discover the noise is still there, it's probably behind the timing belt cover (idler/tensioner pully, water pump shaft bearing, crankshaft bearing, etc.). Good Luck

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