Auto Zone.com has a repair info guide to help you out. Be advised that is a lot of work.
Chain.
Chain
The 24L in a 2010 Dodge Avenger has a timing chain, not a belt. The timing chain should last the life of the car.
Belt
Yes
It has a timing chain.
It can.
No, it has a chain.No, it has a chain.
Your 2.5 liter V6 engine has a timing BELT ( also , it is an interference engine )
replace it. when they go bad you can't fix them.
Inside the front of the engine, driven by the timing belt.
It will last the life of the engine. It shouldn't need replaced.