timing belt question

my question is this. my brother has an o4 aveo and he blew the timing belt . car has 120 km on it. he read on internet somewheres that those cars should get the timing belt changed every 90,000km . are the optra the same?. my 04 optra 5 is at 163,000 km . are these cars bad for timing belts? any info would be great.

http://www.team-bhp.com/forum/technical-stuff/58012-engine-problem-chevy-optra-1-6-a.html

YIKES it seems that this engine is an INTERFERENCE engine; you'll damage your valves or worse if the belt snaps!

here's an example of what would happen:

http://www.carcomplaints.com/Chevrolet/Aveo/2004/engine/timing_belt_failure.shtml