Here is a quick video of a troubling noise. It has been getting progressively louder, but that progression has taken many months, perhaps as long as a year. I'm hoping someone will hear the sound and immediately know what it is. Ok, perhaps that's unrealistic...but it does happen occasionally so I'll hope for the best!

I've pretty much narrowed it down to something related to the fan or the balancer (?). The main crank seal is not great and leaks oil which sprays around in there and covers things eventually. I plan on R&R that when I pull the motor this summer.

Thanks for any suggestions.
Indybenz