How do you tell if a belt tensioner is bad?

[jeepguy4276]

Besides belt squeal, how would you know if a tensioner is bad?

 

[Damotee]

When mine went, it would make a vibrating, rattle sound at low speed and when the A/C was on. Eventually, I would have no power. It drove like it had dirty fuel, always slipping and spluttering. Swapped out the tensioner and its back to normal.

 

[rjkj2005]

If it's bouncing up and down any it's bad

Sent from my XT1585 using Tapatalk

 

[LibertyTC]

Best to replace with a new Gates belt & tensioner assembly with 2 new pulleys, when needed.
The long run of belt on passenger side should be real tight, if ya try to push it in as well.

 

[teeje]

Rapid clicking when turning ac on/off. Play in the tensioner, able to move by hand, etc.

Sent from my SM-N930P using Tapatalk