Question about 1990 Buick LeSabre

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Serpentine Belt Tensioner

What is the process to replace pulley "Tensioner on 1990 Buick Lesabre 3800 engine

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  • Anonymous Jan 19, 2009

    how do you loosen the bely tensioner on a pontiac sunfire

  • cynthia riley
    cynthia riley Mar 01, 2014

    l shape plastic elbow broke

  • Anonymous Mar 17, 2014

    How do i remove the tensioner pulley from a 2005 Buick Rendezvous

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  • Master
  • 3,533 Answers

Take belt off then make sure you have the right size socket and breaker bar to loosen the bolts on the tensioner and do everything in reverse to put new on

Posted on Jan 01, 2009

  • gary bruce Jan 31, 2013

    Thanks but the belt burst and became unravelled

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1 Answer

Serpentine belt


Possibly the tensioner pulley is worn out and needs replaced. It should have wear limit marks on it, a maximum and minimum marking- the tensioner mark should fall between them.

Jan 06, 2014 | 2003 Buick LeSabre

1 Answer

What would cause my serpentine belt to not fit on my buick lesabre custom 2001


Those belts have a tensioner on them. IF the belt is too big then the tensioner might not be retracted. It might be missing. There are idler pulleys too. If you have high miles on the this car, the pulley or the tensioner might be worn. The tensioner also has to be pulled back to have the belt put on.

Dec 08, 2013 | 2001 Buick LeSabre

1 Answer

How do you replace the serpentine belt tensioner on 1990 sunbird 2.0 ohc


Click on the following free direct Link. It has several of the Serpentine Belt Diagrams and Tensioners that are possible with your 2.0L 4-Cylinder engine and engine options (AC/No AC, etc.).

http://www.2carpros.com/car_repair_information/year/1990/make/pontiac/model/sunbird/1990_pontiac_sunbird_drive_belt_routing_diagram.htm

A. Remove the Serpentine Belt.
"HOW TO":
Standard Rules to Removal the Serpentine Belt with a Tensioner:
1. Find the Tensioner(s). (See Diagrams on Link)
2. Using a Serpentine Belt Tensioner Tool, Or Wrench OR Ratchet, Rotate/Move the Tensioner USING THE AVAILABLE NUT (on the Pulley or Arm Base) OR the OPENING (3/8ths or 1/2 inch square opening) rotating the Tensioner Pulley/Arm - moving it away from contact with the belt and towards the area where the belt is not in contact with the Tensioner Pulley. The Tensioner is spring loaded, and is hard to rotate/move.
3. Remove the loosened belt off one of the other more easily accessed Pulleys.
4. DO NOT quickly release the Tensioner, but gently allow the Tensioner to rest in its closed position.

B. Remove the Tensioner:
Removing the Tensioner Pulley: See the Diagrams in the Link.
After the Belt has been removed, with the Tensioner resting:

DEPENDING ON WHAT TYPE TENSIONER:
(1.) IF the Tensioner Pulley itself HAS a Bolt Head showing, SOME of these bolts can be removed and the Tensioner Pulley replaced.
(2.) IF the Tensioner Pulley itself DOES NOT HAVE a Bolt Head showing, then go to the Tensioner Base located at the end of the Tensioner Arm. This should have a Bolt Head Showing. Remove this Bolt and the whole Tensioner Assembly will come off.
(3.) Some Tensioner Assembly's need you to locate and remove mounting bolts.

If Applicable: When replacing the Tensioner Assembly - MAKE SURE you place the protruding "nipple" on the underside base of the Tensioner into the appropriate cavity on the engine face.

Standard Rules for Installing the Serpentine Belt with Tensioners:
a. Pick a Pulley that is most easily accessed. This will usually be on top. This will be the last Pulley that the belt will go on.
b. Using the Diagram: Install the new Serpentine Belt on the remainder of the Pulleys....over, under, left right.
c. Using a Serpentine Belt Tensioner Tool or Wrench or Ratchet Tool: Rotate/Move the Tensioner Pulley/Arm "away" from Belt contact area on the Tensioner. This spring is pretty hard and with a new belt, it will be even harder to install. Rotate/Move this to as-close to the maximum allowed inorder to have enough slack in the belt to get it up and over the last pulley.
d. Using your other hand - Pull the Belt up and over the Last remaining Pulley.
e. Before releasing the pressure on the Tensioner, visually inspect the remainder Pulleys and the Belts' Positioning on them


Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.Com!

Mar 13, 2010 | 1990 Pontiac Sunbird

2 Answers

How to change a serpentine belt on a 97 buick lasabre?


  1. Remove the belt guard or coolant recovery reservoir as required.
  2. For 1996-99 supercharged engines, perform the following:
    1. Raise and safely support the vehicle.
    2. Remove the right-hand splash shield.
    3. Remove the connector from the crank sensor.
  3. For 1996-99 vehicles, remove the engine mounting bracket lower nut, stud and spacer. Carefully lower the vehicle.

CAUTION To avoid personal injury when rotating the serpentine belt tensioner, use a tight fitting wrench that is at least 24 in. (61cm) long.

  1. Take note of the belt's routing. Lift or rotate the tensioner using a suitable sized breaker bar in the square opening or box end wrench on the pulley nut. Remove the belt from the pulleys.
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You can use a box-end wrench on the pulley nut to rotate the tensioner ...

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... then remove the belt from the pulleys

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Aug 29, 2009 | 1997 Buick LeSabre

1 Answer

Adjust tension on fan belt


Your '90 Benz has a belt tensioner that is automatic. You just insert the correct tool to ease the tensioner pulley, (The tool is inserted into the bracket for the tensioner pulley), to the left as you're facing the car. Then slip your serpentine belt off. Reinstallation is a reversal of this process. (I believe it's to the left, don't quote me on that)

The radiator support in front, should have a diagram of how the serpentine belt goes on the pulleys.

If your serpentine belt slips, then the belt tensioner pulley assembly is bad, needs to be replaced, or the serpentine belt itself is worn out.

Apr 19, 2009 | 1990 Mercedes-Benz 300 Diesel

1 Answer

Diagram to change fan belt on 1993 buick lesabre


the "serp" belt is self-adjusted by a spring loaded tensioner pulley. the proper size wrench or a 3/8" square drive inserted in the tensioner and rotated will release the tension to allow the belt to come off. reverse order to install. DRAW A PICTURE OF THE ROUTING OF THE BELT AROUND THE PULLEYS BEFORE REMOVING CURRENT BELT!!

Aug 02, 2008 | 1993 Buick LeSabre

1 Answer

Serpentine belt tension


One pulley is a tensioner. Put a wrench on the nut in the center of the pulley and relieve the tension from the belt.

Jul 14, 2008 | 2000 Buick LeSabre

2 Answers

Serpentine Belt


On my car, the water pump went out, the axle got cocked sideways, and the serpentine belt came off a got chewed up.

Other than something like that, I think it would have to be the tensioner not doing it's job.

Jul 08, 2008 | 1992 Buick LeSabre

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