Question about Buick LeSabre

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I want to replace the serpentine belt on a 2003 Buick LeSabre Custom with V6. How do I release tension on it?

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Look for small pulley with a square hole in it then you will have to install a 3/8 ratchet into it and pull in either direction until you see the belt loosen its a spring loaded tensioner so it will return once pressure is relieved, be careful these tensioners are very strong. in some cases they use a bolt and you will have to use a socket to release the tension most tensioners are located towards the center of the belt routing.

Posted on Nov 14, 2010

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  • Buick Master
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U need a serpentine belt removal tool u can rent one at autozone.hope this helps

Posted on Nov 14, 2010

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2 Answers

We need replace the serpentine belt on a 1998 Buick Lasabre


Easy job on those vehicles. Usually need a wrench that fits over the belt tensioner, and you raise or lower it, taking tension off the belt. then just slip it off the nearest pulley-often the alternator pulley. Now you can let go of the tensioner and remove belt. Notice how it is fit. There should be a diagram on a sticker of how the belt fits on.

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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.

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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.

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2 Answers

Diagram needed


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Find the belt tensioner there should be a place in it to put a 3/8 ratchet or on some there is a bolt head that should be a 15mm wrench pull the tension off the belt and remove it .

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The belt tensioner is to the right below the alternator .

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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!!

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1 Answer

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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

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