It is self adjusting.
Timing chain as well as belt cannot be adjust. If the chain has got stretched you have to replace it.
Chain - which never needs to be replaced - you should have it inspected thought to adjust minor stuff thought
timing chain timing chain
timing chain timing chain
It has a timing chain
timing CHAIN(s)
It has a chain ...
timing chain
Chain
The V6 has a timing CHAIN
It has a timing chain
timing chain