Hello. I was wondering if someone here could identify an engine sound for me.

The recording is of a 3.0 L Duratec V6 (Ford Escape) It is warmed up, idling, and ac is off. The noise in question is the telegraph sounding one riding on top of the engine sound.

Probaly something obvious and I will look stupid, but at least I will have learned something :-/

edit: sorry, this is not the engine. Loudest on driver's side towards the rear, like near the passenger door. Something vibrating I think...

Thanks