This vehicle has a timing chain.
It does not need to be changed unless it fails.
Timing chain.
Hopefully, never. I have 3 Jeep Grands with 253K, 203K, and 167K - none has needed a timing chain yet - all V8s.
it has a timing chain
where are the timing chain marks
Chain
The distributor is set to zero with a scan tool. It is not done with a timing light.
As a rule of thumb a timing change needs replaced every 100000 miles, or when you hit the timing marks with a timing light and see a lot of jump and have ruled out other posibilities related to ignition.
Timing chain
1998 i30 has timing chain. just confirmed from my dealer.
chain
It has a timing chain and gears.