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Tension pulley making belt smoke - Cars & Trucks

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Replace if not turning bearing fried

Posted on Apr 29, 2017


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Replaced serpentine belt in a 03 ford tarus but it makes loud screetching sound and the belt smokes what coulds it be

belt is slipping because a pulley is not turning
did you tension the belt correctly

Mar 04, 2018 | Ford Cars & Trucks


Replace or install a serpentine belt

This may not work for all engines but should work for most. Most engines are the same when it comes to a serpentine belt. There is a series of pulleys. Some are ribbed and some are flat. The belt will go on to match. The ribbed side of the belt will pass across the ribbed pulleys and the flat side against the flat pulleys. It is fairly easy to figure out the outermost pulleys which the belt must go around. Once you have done this you can assess which ones to put the flat side of the belt against.

One of the pulleys is the tension pulley. It is generally on a moving arm and has a spring tensioner. When the belt is off, the arm should move.

When a belt is on the engine you have to release the tension to remove it. This generally requires a fairly large breaker bar or a socket wrench with a cheater pipe to generate enough force to release the tension. There is generally a nut that holds the tension pulley on. If you are loosening the nut when you pull with the breaker bar you are pulling the wrong direction. It takes a good amount of force to loosen the tension on the belt. If you removed the tension pulley as a means of removing the belt you will have to reattach the pulley and then make sure you pull in the correct direction to allow the belt to go over the tension pulley to reinstall.

If you are replacing a broken belt you have to move the tension pulley to allow the belt to slip onto it. Pull the breaker bar to move the pulley. Pulling it far enough allows the belt to easily slip on. Again, if the nut is loosening or you aren't moving the pulley and arm you are pulling the wrong way. It takes quite a force to move the pulley.

Once the belt is on the tension pulley, make sure it is properly sitting on all pulleys and the grooves in the belt match the grooves on the pulleys.

Be careful not to pinch any fingers.

And make sure you don't leave any sockets attached when starting the engine.

on Jun 07, 2010 | Buick LeSabre Cars & Trucks

2 Answers

After driving my renualt mageane for 25 minutes it strats with the smell of rubber then strats smokeing on the engine

Look at all the components the belt is turning. Something has stopped turning and is smoking the belt. Most likely the alternator, water pump and the tension and idler pulleys.

Sep 01, 2016 | Renault Megane Cars & Trucks

2 Answers

I just installed a power Steering pump and pulley. On my 1994 Chevrolet blazer . The belt is squeaking and smoking what's wrong?

Hi,for the belt to be squeaking and smoking the belt must be slipping,check all pullys spine freely if ok then check tension and if still smoking and sqeaking relace belt.

Nov 26, 2015 | Chevrolet Cars & Trucks

1 Answer

Serpentine belt

BELT ROUTING DIAGRAM 1997 Mercury Sable 3.0L SFI 6cyl The Belt Routing Diagram

0900c1528025fc65.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 16: Rotate the belt tensioner and...

0900c1528025fc66.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 17: ... remove the belt from around one of the pulleys to remove the belt

WARNING Use caution when removing or installing the belt and make sure the tool does not slip from the drive belt tensioner or personal injury or damage to the belt tensioner and the belt may occur.

  1. Attach a 15mm socket or wrench to the bolt attaching the tensioner pulley.
  2. On all 3.0L (OHV) engines, rotate the drive belt tensioner clockwise to relieve belt tension and slide the belt off the pulleys.
  3. On 3.0L (DOHC) engines, rotate the tensioner counterclockwise to relieve belt tension and slide the belt off the pulleys.

To install:
  1. Install the drive belt on all the pulleys except the tensioner pulley.
  2. Rotate the belt tensioner as outlined in the removal procedure to relieve belt tension and install the belt onto the tensioner pulley. Make sure the V-grooves make proper contact with the pulleys. Make sure the spring keeper releases or improper belt tension will occur.

Aug 05, 2012 | 1997 Mercury Sable

1 Answer

I just changed my serpentine belt on my 2002 Buick LeSabre. (The old one split in half). Everything seems to be lined up properly but when I started the car to check the alignment, I heard a loud...

remove the belt and check all the pulleys that the belt drives. sound as if one of the bearings in the pulley is seized making the belt squeal and smoke.

Jul 17, 2011 | 2002 Buick LeSabre

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

How to change serpentine belt on 2000 chev blazer

There is tension held on belt by a pulley. You need to release tension and slip belt of nearest pulley. Use a socket and ratchet on the tension pulley to release tension. Make sure there is a diagram of belt routing before you take belt off. Make one yourself if there is none under the hood

Aug 15, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

How to change serpentine belt

Most are held in place by a tension pulley. It is on a spring load tension arm. It takes a breaker bar to get enough force to move the arm. Pushing/pulling in the wrong direction loosens the nut. Make sure you are moving the tension arm. This will release the tension on the belt and allow it to slip off. Pay close attention to the winding around the various pulleys. When putting on the new one make sure the grooves in the belt get into the correct grooves on the pulleys. A smooth pulley goes against the smooth side of the belt if you get confused. Likewise the grooves on the belt go into the grooved pulleys. Reapply the tension on the tension pulley to slip the belt over the uppermost pulley (should be grooved). Check the alignment before starting the engine.

Mar 13, 2010 | 1995 Buick Park Avenue

3 Answers

How to change a fan belt

There should be a diagram attached to the car near where the belt goes showing how the belt is to run through the pulleys.
Newer vehicles have a tension pulley which is a pulley on a spring loaded arm that keeps the belt tight.

First run the belt on all the other pulleys and then use a wrench to hold the tension pulley back while you slip the belt on.

Older cars do not have a tension pulley and you had to usually loosen something like the alternator a little bit to get it on.

Mar 12, 2010 | Renault Sport Cars & Trucks

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