Grinding, " diesel " noise under valve covers

I hope it Is! I just don't remember it happening before.. I've been working nights, and having issues accessing the " Corporate " approved materials. So that has my sleep schedule jacked up. And, my Gal, is in the Hospital, again. So I haven't had a chance to run her...Much Appreciated to hear Your Response!!!!!!! Thank You! Copper and AL in my oil filter , scares me. I'm wondering if I have a bearing issue (and that's not easily addressed, in my World)