I have a rattle seemingly coming from under the vehicle. It sounds something like heavy gauge sheet metal that is somewhat loose.
I was thinking it may be something in the exhaust system which hasn't had anything replaced or repaired in many years.
My favorite mechanic speculates (without having seen or heard) that it could be the timing chain which has never been touched in close to 100K miles of lifetime.
Is either of these scenarios likely?
[This is mostly a rhetorical question in that the car has a doctor's appointment for Tuesday.]