I was driving down the interstate the other night. Hear a loud ding, like a rock hitting the car and the engine started vibrating heavily. At first I thought it was a flat tire but everything was good there. No CEL was thrown. I’m thinking it may be the harmonic balancer as I think this doesn’t look normal.
I will agree, you need to replace that and not run the engine until you do. The vibrations will kill your crank bearings.
I would also look around on your undercarriage, and make sure that the big wrench or whatever did this is not lodged someplace else
The bummer part is, I don't think it slides off, you're going to have to pull the engine out and use a Part puller to get it off. I would call your local repair shop and get an estimate.
