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Answered 2009-11-05 20:12:20

here is a link to the tensioner pulley (pulley diagram #5 pulley)

. Looking from the passenger side, it is the middle pulley from the right side. It is a 13mm wrench or socket, and it is turned toward the rear of the motor to loosen. You will probably need a second person to align the belt from the top of the motor while you loosen it from beneath. There is not much room for a socket, so i found it easier to use a small breaker bar or long handled wrench. Good luck


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You can change the serpentine belt by loosening the tensioner pulley. When the tensioner pulley is loose and the serpentine belt will become loose. Put the new serpentine belt on and tighten the tensioner pulley.

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where can i get a diagram for a serpentine tensioner belt for a 1998 Oldsmobile bravada

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Your Explorer has a serpentine belt tensioner which keeps the proper tension on the serpentine belt unless the tensioner has failed.

As viewing the motor from the front of the car, the belt tensioner is located on the left side of the engine. On what is essentially the front of the motor, the belt tensioner is located just below the idler pulley.

I have used a socket with a ratchet handle. The ratchet will allow you to get more travel to move the pulley and get the belt off.

Use a 1/2" socket wrench. From underneath the truck, put the 1/2" drive into the front of the tensioner pulley and rotate the tensioner in a downward direction to loosen the tension. If you want to remove the serpentine belt, slide the belt off one of the pulleys with your other hand. Be careful not to get your finger caught in between the belt and the pulley if the tensioner moves back up. If you have a second person to help, have them slide the belt off the alternator pulley from the top side.

usually serpentine belts get their tension(tightness) from the belt tensioner

the tensionjer is a spring tensioner so if it is to low and not holding tension on the belt you need a new tensioner

Begin by loosening the tensioner pulley. Slide the tensioner pulley to the right and the belt will become loose. Remove the old belt and put the new belt on. Tighten the new belt by sliding the tensioner pulley to the left.

You probably have a bad serpentine belt and tensioner.

If it's the timing belt tensioner then you have to loosen the tensioner bolt and then use a 1/4 inch hex bit and turn the tensioner clock wise. Be sure to turn the tensioner only counter clockwise to retension and align the 2 pointers. The alternator or serpentine belt tensioner requires a 13 mm wrench to turn the tensioner counter clockwise to release the tension.

One way is to put a wrench or, better yet, a long handled ratchet (12" or so at least)on the tensioner pulley center bolt and turn it such that the pulley rocks to one side or the other to relieve tension, slide the belt off and release the pulley slowly. Te reinstall the belt, use the same technique.

There is either a tensioner or an adjustment screw on a pulley. A Haynes manual or Chiltons manual will help with the routing of the belt, and how to adjust the belt tension as well. Usually the idler pulley is used, before loosening the top bolt , loosen the center bolt of the pulley.

The idler pulley is between the alternator and the A/C compressor.

remove the belt. then in center of the tensioner is a bolt that goes into engine. remove this bolt. then tensioner should come off.

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