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You use a timing light to check the marks on the timing chain/belt.
No it does not have time to chain it has a timing belt
If the timing chain has jumped time, the vehicle will run rough or not at all. You will need to check the time with a timing light to see if it is off.
Mostly it has a time belt 99% it has a time belt WRONG IT HAS A CHAIN !!
A timing chain should last the life of the engine. Timing chains are INSIDE the engine and as such are constantly oiled. By the time the timing chain and/or tensioning mechanism is worn out, it's about time to rebuild the engine.
These have a timing belt . They stretch out and yours is old . If you can not time it or it is mis firing for no other reason , then it is most likely bad .
The time chain is located under the timing chain cover, which is behind the fan and under the water pump.
You do not change the timing chain unless it becomes noisy. It is designed to last the life of the engine.
depends on if your trying to set the time on the timing chain or trying to set the base timing for the computer. The base timing is fixed by the PCM/computer. for setting the time on the timing chain consult a service manual
All sienna 2008 or older have timing belts. It easy to tell look at you sienna and see if there a timing belt cover. that covers the cylinder head. All vehicles that use timing chains are enclosed and not cover is showned. Since the timing chain is always be lubericate by the engine oil all the time. That's why it not exposed.
Timing chain or most of the time doesn't need servicing
It has no Timing Belt, it has a Timing Chain.