Those lines radiating outwards from the bolt hole are probably something like grease or an anti corrosion material that has been centrifuged outwards.In the post above , that is a brand new one, never installed. Here is the old one that was removed with the motor. It’s flat but has some weird lines from the crank holes.that why I want to replace it while the motor is out. View attachment 59979View attachment 59980View attachment 59979View attachment 59980View attachment 59981 I have never seen a new one but would assume that it would be perfectly flat.