Yes, you can stretch it to put it on and then adjust the tension.
you do not adjust tension on a serpentine belt the tension is automatcally adjusted if the belt is loose, replace the belt SOME TIMES THE TENSIONER CAN BE WEEK ALSO.
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.
Tension is automatic. There is no adjustment.
you dont, it has a spring loaded tensioner
There is no way to adjust the belt tensioner, if it's not keeping enough tension on the belt the complete tensioner itself will need replaced.
should have spring loaded tensioner nonadjustable
To loosen the tension on a serpentine belt on a 2005 Grand Caravan 3.8L, turn the nut of the belt tension pulley to loosen it. Adjust the belt, then tighten the tension pulley by turning the nut in the opposite direction.
Your Explorer has a serpentine belt tensioner which keeps the proper tension on the serpentine belt unless the tensioner has failed.
You don't, it has a spring loaded tensioner, If the serpentine belt is loose the tensioner has failed and needs to be replaced
You cannot adjust the tension on this, it has a spring inside of it. If it is weak, it must be replaced.
you cant, it has an automatic belt tensioner.. you would have to replace the belt if it has stretched