How many miles did yours have on it when it burnt a valve? This Jeep only has 68,000 mi. on it. I don't think it is a burnt valve because it happened all of the sudden on this cylinder and it has a noise under the valve cover that was loud enough for me to hear over a cell phone. Did you pull your heads? Do you have to pull the front off too? Was it a big job? I am NOT looking forward to this!