Timing chain
The DOHC SL2 has a timing chain.
The Saturn sl2 does not have a timing belt, it has a timing chain. And under most conditions it does not need replacing.
Timing chain
The 4 cylinder Saturn's all had timing chains.
It does not work because it has a timing chain instead.
You are correct that the SL2 uses a timing chain. However, since it uses a timing chain it does not need to be replaced as does the timing BELT. In general, a timing chain should last the life of the engine.
No, there is no timing belt on any of the the 4 cylinder Saturns, they all use an internal timing chain.
No such thing as a timing chain belt. It is either a belt or chain. Replace the belt according to the schedule in your owner's manual. If it breaks and your engine is an interference engine, you will 95% of the time have damage. You will know the extent of the damage when the engine is torn down. The 1992 SL2 has a timing chain. Mine has 240,000 miles on it and is still running fine.
Timing BELTS are outside the engine, run dry, and have no external lubrication. Timing BELTS should be replaced according to the manufacturers schedule. But the SL2 is not equipped with a timing belt, it uses a timing chain. Timing chains are internal, well lubricated, and designed to last as long as the rest of the engine. You shouldn't need to replace the timing chain until you rebuild the engine.
That would be never. All s-series have timing chains. (chain will stretch and get noisy if car oil not checked and changed on regular basis)
This proceedure is covered in the chiltons Saturn book available at auto zone and ect.
the chain keeps the camshaft/valves in time with the crankshaft in order for combustion to take place