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There is an automatic tensioner that keeps tension on the belt. THere should be a label in the engine compartment somewhere giving you a diagram of the path of the belt and showing where the tensioner is and which way it turns to loosen the tension. On the 1995 GMC Sierra that I just worked on, I loosened the nut on the front of the tensioner a little, then I used a big pipe wrench on the tensioner itself to rotate the tensioner assembly counterclockwise then removed the belt while still holding the tensioner, then gradually released the tensioner. From looking at it I guess there is a special tool you can use to do this, you might want to check with Advance Auto. or whoever your closest auto parts store is to see if they will loan you the tool.

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โˆ™ 2008-12-20 17:10:55
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Q: How do you loosen tension on drive belt fo the alternator?
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How do you tighten belt onto a new alternator.?

If it is a serpentine belt, the tension is automatically adjusted by the tension idler. If the belt is loose then the tensioner needs replacing. If it is a normal drive belt, then the alternator is mounted on a slotted bracket that allows you to adjust the position of the alternator. You can loosen the bolts and adjust the tension on the belt.

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How do you replace the alternator on a 95 grand am gt?

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WHAT PULLEY DO I loosen to get single drive belt on?

If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.

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