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1991 Buick Regal 3.8L Belt Tensioner

How do you replace the belt tensioner pulley on a 1991 Buick Regal 3.8L

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Remove belt and unbolt center pulley bolt. I believe it's a backward theaded bolt. Turn to the right to loosen.

Posted on Jun 17, 2009


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1 Answer

How to replace serpentine belt to alternator

You'd better hope you have a belt routing picture under the hood. Usually the belt is released at the tensioner pulley, which is spring loaded to keep the belt tight. The pulley is unloaded by using a 3/8 long handled socket wrench. Find the square hole.

Dec 26, 2014 | 2002 Buick Regal

1 Answer

How do I replace the tensioner pulley?

Which tensioner are you refering to the serpentine belt or the timing belt tensioner.

May 08, 2012 | 1998 Buick Regal

1 Answer

Getting alternator back on problems with tension pulley

Do you have the tensioner arm pulled back with the special tool? The tensioner must be full deflected to get the belt on, it is a really heavy spring.

Feb 16, 2012 | 1995 Buick Regal

1 Answer

I need to install a new serpentine belt on my 95 regal. It says that it is a spring loaded tensioner on the idler sprocket, but cannot find a way to loosen the tension on it. Do I just loosen the nut that...

Look closely as there should be a square one half inch or three eighths inch hole in the tensioner. Place the proper sized ratchet or breaker bar in the hole and turn which ever way loosens the belt. When replacing the belt be sure the belt is properly settled in all the pulleys as if it's off by one spline on any pulley it will quickly damage the belt. Please rate this answer, thanks.

Feb 05, 2011 | 1995 Buick Regal

1 Answer

How do you remove a serpentine belt from a 91 buick?

When looking at the front of the engine you will see one of the idler pulleys will have a 3/8 square hole in it,thats for a 3/8 breaker bar or ratchet to fit in to ..hook up the tool and move counter clockwise to rotate the tensioner so you can remove the belt... do the same when installing the new belt

Sep 04, 2010 | 1991 Buick Regal

1 Answer

How do you put on alternator belt

Route the belt as shown below (from but leave it off of the alternator. Use an 18mm wrench or socket on the tensioner pulley and pull toward the front of the car. With the tensioner pulled down, slip the belt onto the alternator completing the diagram. Check routing to verify that belt is still riding on all pulleys.


Sep 01, 2010 | 1993 Buick Regal

1 Answer

How do I change the Serpentine belt on a 2001 Buick Regal

You have to turn the tensioner pulley clockwise using a ratchet wrench with a 2 or 3 foot bar attached to it for leverage to get the belt off. Then install the new belt according to the diagram sticker at the front of the engine compartment.

Jan 27, 2010 | 2001 Buick Regal

1 Answer

1997 Buick Regal fanbelt problem

buy a new tensioner assembley and idler pully and might as well get a new belt while your at it. you will need a 3/8 ratchet a 15 mm socket and a 13 mm socket there is one bolt holding on tensioner remove it discard old tensioner put new tensioner in place and tight bolt. second remove bolt from idler pulley discard old pulley put inton place and tighen bolt. next install belt fallow belt routing digram put head of 3/8 rattachet into hole on tensioner or on bolt head of tensioner pulley depending on style of tensioner and pull or push to create slack in belt push belt into groves on all pulleys and release tensioner

Jul 31, 2009 | 1997 Buick.5 Regal

1 Answer

Easing tension to replace water pump

You may not need a serp tool. Look for a place on the tensioner to fit your ratchet into then turn to push tension off. If there is enogh room to get the ratchet in

Jun 27, 2009 | 1995 Buick Regal

1 Answer

How do I remove an alternator from a 1991 Buick Regal Gran Sport

Is it a serpentine belt? If so, there should be a small pulley, called a tensioner. Loosen that, and you should be able to remove & replace your belt.

Nov 22, 2008 | 1994 Buick Regal Gran Sport

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