Since the engine has a 10:1 compression, I suspect it is an interference engine (if the chainbreaks the pistons will hit any valves that are open. In general a non-interference engine will have less than 8:1 compression.)

A chain will generally provide audible sounds, particularly at idle, that it is unhappy. Timing chains rarely break. They do stretch which retards the cams and reduces power. People replacing stretched chains often report the engine feels more responsive.

I usually replace the sprockets, tensioners, and guides when replacinga timing chain.

Once had a small OHC turbo diesel that had a timing belt. These had to be replaced every 40-60k miles. Not a great idea. If the belt broke while running at least a new head was needed.