Timing chain tensioner replacement

Hello,

This Outback is equipped with a timing belt and not a chain.
Typically when a timing belt is changed the tensioner gets changed as well as part of the service. So if the warranty states it will cover timing component then you should be good.
So you cannot just change the tensioner.

You might find this article helpful:

https://www.2carpros.com/articles/how-a-timing-belt-works

https://youtu.be/6iGdGMNc6Vk

I have attached complete timing belt replacement procedure for your reference.

Please let me know of any questions.

Thank you.