you have to put a socket wrench into the hole on the tensioner and pull up on it to release the tension from the belt.
put a wrench on the tensioner pully and pull it to release tension on the belt
If it is a drive belt and not a serpentine belt is has no tensioner. You manually adjust the tension by normally adjusting tension by moving the alternator. Loosen to bolts holding the alternator in place and then adjust the tension. Tighten the bolts when the tension is right. If it is serpentine belt if you follow the belt around the the engine you will see the tensioner.
how to release serpentine belt tensioner on 1991 C1500 Chevy Silverado?
you have to push down on the tension pulley, then you would get slack in the belt
Rotate the drivebelt tensioner to release the tension on the belt and remove.
You should not have removed the tensioner to install the belt. It has a pivot point that and can be moved in order to release the tension on the belt. Once you install the new belt, leave it off the tensioner until last, pivit it and install the belt oner the tensioner.
locate the spring tensioner roller assembly and release the tension with a 1/2 inch breaker bar while you remove the belt from the closest pully you can reach at the same time. When you put a belt back on you have to release the tension roller while slipping the belt back on the last pulley.
there is a diagram under the hood and in your owners manual of the belt routing, you have to release the tension on the belt tensioner and the belt will come right off and to put a new belt on just follow the routing chart and release tension on the tensioner to get belt back in place and when belt is back on all pulleys just let go of the tensioner and your done.
Look in the engine compartment for the "serpentine belt" path & tensioner diagram. Release the belt tension at the tensioner, remove & reverse operation.
Note:The drivebelt routing decal on the radiator shroud to help during drivebelt install * To replace the belt rotate the tensioner pulley clockwise to release belt tension * Remove the belt from the auxiliary components and slowly release the tensioner * Route the new belt over the various pulleys again rotating the tensioner to allow the belt to be installed then release the belt tensioner
The ac belt has a tensioner that is accessed from below, and takes a tensioner tool to loosen. Remove the serpentine belt, release tension on the ac belt then the belt can come off for replacement.