Question about 2000 Ford Focus

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Car makes tensioner noise when ac is on and car is in reverse

It sounds like tensioner or pulley is making noise but only when ac is on and car is shifted into reverse, what typically causes this?

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Revirse ban slipping in transmission.

Posted on Aug 01, 2008

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My Echo makes a squealing noise randomly when driving & airconditioner is turned off?


Your serpentine belts tension is loose or the belt is going hard. Check the tension on the tensioner pulley and condition of belt.
The belt is slipping on your accessory pulleys when a load is placed on them such as power steering, alternator and clutch fan.

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Power steering pulley or tensioner pulley?


Take the tension off the belt and then move each pulley by hand . If the tensioner pulley feels rough or makes a noise, replace it. Same goes for the power steering, although the pump may be noisy without the pulley feeling loose.

Nov 17, 2014 | 2005 Dodge Neon SXT

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If idle pulley was replaced and still noise what is it


Well a place to start is pull off the belt and spin the Idler, Tensioner, AC, Alternator, and Power steering, Smog pump (if equipped) pulleys all should spin easy with no noise. Does the sound go away or change when turning on the AC? Also start the car with the belt off to make sure the noise is not coming from the motor. If noise go's away then it has to be one of the items I mentioned above. Cost will be depending on location and type of part gone bad.

Feb 28, 2014 | 1997 Oldsmobile Cutlass Supreme

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What's the CHEAPEST fix for my loud ac compressor?


I have a2004 mustang with a 3.9 making the same noise,and the shop replaced the AC compressor and all belt tensioners. I found that the noise is the timing chain tensionors .

Oct 28, 2012 | 2002 Ford Mustang

1 Answer

I replaced the altenator and the serpentine belt two weeks ago. Now i hear a squeaking noise. I tried a spray for the belt but the noise is still there.


Check your tensioner pulley -- if you do not have enough tension on the serpentine belt, it will slip on the pulleys and cause a squeaking noise (very loud and high pitched). if you push on the serpentine belt with your hand, it should not more more than about an inch -- if it does, you are low on tension. If it does not have any give at all, then you have too much tension, and one of your pulleys might not be turning properly, causing that same noise. If your tension is right, and your car is still making that noise ... and belt dressings (the spray you probably used) are not working to stop it, then it might be a piece of rubber stuck on one of the pulleys, but this usually will not make that sound ... just smoke and a burned rubber smell.

May 24, 2011 | 2005 Pontiac Grand Prix

1 Answer

Hear funny rattling noise by tension spring pulley, replaced pulley but there is still noise. could it be my bearings in ac compressor making noise? do the clutch suppose to move by hand?


yes! you should be able to turn the clutch by hand.run the car,open the hood,have someone turn the a/c on.you should see and hear the clutch engage.

May 17, 2011 | 1998 Cadillac DeVille

1 Answer

Strong, almost continuous squeeky noise coming from the front left end of the car when steering left and right. it is not the hissing type of noise coming from the power steering box, and it started...


Sounds like it has a tensioner pulley, idol pulley, or an ac going bad. I would start by looking at them while running and see if there is any noticable defects in their function. IE nothing is leaning or turning slower then they should be. If nothing shows give each one a quick spray of lube one at a time and see which one makes a difference.

Mar 26, 2011 | 1999 Lincoln Town Car

1 Answer

I have a squeaking sound that I think is coming from the ac compressor. I noticed it stoped when I put on belt dressing and the pulley got wet. I heard the same sound coming from other monteros as well,...


once the belt become loose it slips and its friction surfaces become damaged .. even if its then tightened properly it may still slip .. an old damaged belt should be replaced and tensioned properly ... its common for older type belts to slip and make noise .. it is not as common in later cars since they often have automatic belt tension and improved belts .. any slipping is a sign of some other problem ... one frequently seen problem on some cars is a pulley that is spring loaded to keep the belt properly tightened .. the pivot on the pulley freezes up and no longer maintains proper tension .. those pulleys can sometimes be re lubed but often are hopelessly frozen and need replaced ... also other pulleys and the alternator bearings can start to make a squeaking noise when the sealed bearings lose there lube .. you can put a drop of oil on each bearing to see if one quiets the sound ..

Sep 17, 2010 | 2001 Mitsubishi Montero Sport 4WD

4 Answers

I have a 2001 dodge caravan, We have a noise coming from the alternator pully, I think or the tension pully, The noise is very loud and kinda sounds like a gragle.


there are a few things you can do to check this ,it sounds like a bearing from the alternator . it is behind the pully ,or the bearing on the tensioner .you can take the serpentine belt of the alternator by usint a pry bar or a ratchet on the belt tensioner .you can check both by spinning them when ther is no pressure on them the one that makes the same noise sound is the bad one ,there is a diagram on the front hood on how to remove and replace the serpiene belt

Nov 19, 2009 | 2001 Dodge Caravan

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