Just called Serra Toyota again (last time was 6 months ago). The guy said if I look in the manual it says nothing about the timing chain. He said that todays toyotas are designed to last the life of the vehicle. He said some folks are stuck in the old days of changing them at 120k miles but it is not necessary. He said they do very few changes of chains and the chances of a problem are very small.
Now I have to decide if I trust him....
