If it is dirty, or every 2 years.
It has a chain
90,000 ks
It should be replaced when it begins making a noticeable noise.
I wouldn't recommend it if it hasn't leaked.
It goes by mileage ....100,000 miles is recommended
At around 90000km timing belt should be replaced!
Listed in your owner's manual.
Yes it should be!
Timing belts for most vehicles are supposed to be replaced at 60k. Some vehicles at 90k.
120,000 miles , according to the Gates website
Never. This is not an item you replace at a scheduled time or mileage. It should last the life of the engine.
Yes it can bend valves, when the piston makes contact with an open valve if the belt breaks. It can also destroy the piston and crack a head. The 1996 Civic engine is an Interference Engine and as such will self destruct if the belt breaks. The belt should be replaced at 90,000 miles under normal conditions and 60,000 under severe conditions. It should also be replaced at 10 years regardless of mileage.