Drive Belt Tensioner: Testing and Inspection

Drive Belt Tensioner Diagnosis

Caution: Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.

Note: When the engine is operating, the belt tensioner arm will move. Do not replace the belt tensioner because of movement in the belt tensioner arm.

1. Remove the drive belt. Refer to Drive Belt Replacement - Accessory (w/o LS9) (Drive Belt Replacement - Accessory)Drive Belt Replacement - Accessory (LS9) (Drive Belt Replacement - Accessory) or Air Conditioning Compressor Belt Replacement (w/o LS9) ().
2. Position a hex-head socket on the belt tensioner pulley bolt.
3. Move the belt tensioner through its full travel.

* The movement should feel smooth.
* There should be no binding.
* The belt tensioner should return freely.

4. If any binding is observed, replace the drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Accessory (w/o LS9) ()
5. Install the drive belt. Refer to Drive Belt Replacement - Accessory (w/o LS9) (Drive Belt Replacement - Accessory)Drive Belt Replacement - Accessory (LS9) (Drive Belt Replacement - Accessory) or Air Conditioning Compressor Belt Replacement (w/o LS9) ().