Hi All I recently bought a 98 cobra and am trying to get it fixed up and first thing was the motor was making a knock sound in the head so I have removed the valve cover on the driver side and found this. Looks like the rocker has fallen off the valve and has started eating up the exhaust cam. Any idea what can cause this? The cylinder has oil leaking into it from the head but still has decent compression when tested. Im assuming I will have to pull the head but I wanted to see if anyone had ever seen this before and what needed to be repaired on the head. Thanks!