Its not a header leak, it's metal on metal, and its definitely not a bearing. Oil is seeping from the service port and there is air pushing out like a valve is not closing all the way. The ticking is coming from what I think is the head on the passenger side of the vehicle. I put some motor honey in her and the noise was almost completely subdued for a few days, but then returned. A friend thinks the oil pump is going because the noise quiets down every once in a while after the engine reaches operating temp, though the Guage reads good pressure.