My RC 350 has 58,000 Florida miles on it with the original drive belt and coolant. Both look clean and the belt is smooth. When should I change these out? Please advise.

 

Recommended coolant change is at 100k miles. I'm not sure of the belt. I would think it would be able to last 100-150k miles.

There are some other things recommended be done at 60k miles though, like new spark plugs, and every 30k a brake fluid flush and fill is done. 60k is the big boy service everyone has to pony up for.