Question about 1992 Mitsubishi 3000GT

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Idler pulley makes a whing sound when running

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This is cuased by the bearing the pulley is riding on being worn out, replace it.

Posted on Oct 23, 2010

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  • Master
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Its bearings are going.
Temporary fix: lubricate the bearings of the pulley with 3-in-1 oil.
Keep lubricating the bearings whenever they make noise.
Fix you'll eventually need to do: replace pulley (new bearings come with the new pulley). keep the new bearings lubricated (with bearing grease), and your idler pulley will last 100,000 miles.

Posted on Oct 23, 2010

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1 Answer

2003 Mercury mountaineer high pitch whining sounds like front passengers side- just started today - worse when you accelerate - husband thinks it might be idler pulley bearing??


If it is the idler pulley for the accessory belt, it would make the sound at all times the engine is running, not just under acceleration. I would look to the wheel bearing or the brakes on that corner of the vehicle.

Feb 11, 2016 | Mercury Cars & Trucks

1 Answer

How to replace a idler pulley on a 1997 international 4700 series


Hi Melissa:
Nice truck!
I'm assuming that the bearings in the idler pulley are shot which is why you're replacin the pulley. Pulley's are typically attached by a bolt through their centre. Replacing the idler consists of getting the bolt out and exchanging new for old. Here's the route I would recommend:
SAFETY FIRST - Disconnect negative battery terminal.
- Make a diagram of belt routing.
- Slacken idler and remove belt
- Remove Idler retaing bolt (Watch for washers or spacers)
- Install new Idler with washers or spacers in same position.
- Tighten retaining bolt.
- Use diagram to re-install belt;
- Re-connect negative battery terminal.
- Check for stray tools or loose objects.
Test run.

Mar 11, 2015 | Cars & Trucks

2 Answers

Serpentine belt on '97 3.8 Mustang pops off idler pulley even though everything appears to be properly aligned after A/C compressor replacement.


If the idler and nearby pulleys are all in-line, not excessively worn and the axis is exactly at a right-angle to the belt run the belt should not pop off, therefore either the idler or other pulleys are worn tapered or sagging or it is possible the belt has become stretched on one edge.

You could try turning the belt around so it is traveling in the opposite direction and see if it makes any difference. Some idler pulleys will also turn round if required.

I hope this provides food for thought.

Feb 26, 2015 | Cars & Trucks

1 Answer

No Space between the Belt at the Idler Pulley and the Water Pump Pulley. On a 4cyl without Air conditioning


check and make sure of the proper routing of the belt. If good check the idler tension spring, check the bearings in all the pulleys the belt runs over.

Apr 04, 2013 | Cars & Trucks

3 Answers

Why belt keeps shredding


usually due to a bad bearing, or from resistance due to a frozen or failing assemble, as in power steering, alternator, or an idler. The best way to determine is to remove the belt and check all pulleys for play and resistance.

Feb 10, 2011 | 2000 Chevrolet Venture

1 Answer

95 Buick lesabre. New belts, alternater, & water pump. Makes clanking noise while idling. Coming from idler. Any ideas to problem.


Sounds to me like an idler pulley bearing. If that is for sure where the sound is coming from. If thats the case then time to swap out the pulley.

Dec 27, 2010 | 1995 Buick LeSabre

1 Answer

Serpintine belt was replace as was the idler arm. alternator is charging, and noise difference when ac is on or off. But noise is very loud when engine is running. When serpintine belt is off there is no...


With the belt off, try to spin each pulley that spins and see if there is any roughness or flat spots on the bearings that you can detect with your hands.

Usually, the bearings on Alternators or idler pulleys go bad before the a/c because the a/c should have oil in it. However, it could be any of the pulleys that the belt spins on.

It can be a process of elimination of changing parts until the sound goes away, if you can't detect it under free spinning conditions with the belt off.

Dec 19, 2010 | 2008 Jeep Compass

3 Answers

When I turn my van on it squeals very loudly and it gets worse when you press the gas. What could it be?


You could have a bad or worn serpintine belt. When you replace it make sure all the pulleys are rotating freelyi.e. air compressor, alternator, tensioner idler & power steering pullies to make sure all of their bearings are running freely. Good luck!

Jun 16, 2010 | 1996 Dodge Caravan

2 Answers

My idler pulley is making a squeaky light grinding niose.


Any Auto Parts store or even a Wallmart may have a WD 40. I would first try to spray this behind or right where you see the Axel of this Idle pulley.
Unfortunately it may be getting old and dried out.
If you have any grease or even - sounds funny - Vaseline - try smearing this on where the Axel meet's the round pulley.
Blessings,
A/V Guy

Nov 19, 2009 | 1998 Nissan Maxima

1 Answer

Getting a high pitched whining sound that increases and decreases with accelleration and decelleration


it is your idler pulley. get it from dealer comes with bracket, just use pulley off bracket. take your belt off and your idler pulley is lower right hand side(facing your engine). 15mm bolt, replace pulley and reinstall your belt. it;s a common problem on trailblazers

May 05, 2009 | Chevrolet TrailBlazer EXT Cars & Trucks

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