Justed wanted to start by saying Hi as I'm new to the sight. I've found lots of good info here already, but need to ask a few further questions. 1. I have an oil leak on the passenger side which seams to be coming from around the valve cover. It is a very small leak, to the point that it doesn't drip to the ground. The problem is, it seems to be getting on the exhaust manifold, which is obviously burning it off creating a horrid smell. The smell gets inside the car when using the heater and idling anywhere for more that a few minutes. My KJ is an 02 with only 43K on it, so it seems odd that the valve cover gasket has failed. Anyone else had this problem? 2. I have CEL codes 300, 303, and 304. I have replaced my plugs already, but maybe I will do it again. I can't find anywhere which cylinders are 3 and 4. Any help on that? Thanks!