How many miles before replacing timing chain? on 2003 Jeep Liberty

I am about to replace water pump and planning to replace belts and tension pulleys but when is time to do timing chain?

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2 answers 2 comments
is it noisey right now?
no, I just thought it was like timing belts that go together with water pump.
You can usually get at least 120000miles on a timing chain or more. That is why you don't see a scheduled replacement for them. Some will last the lifetime of the engine.
thanks