Ok so my 88 260E has an oil leak! I think I have tracked it to the top rear of the motor. I know the timing chain cover leaks to but just a little. I can't see where the damn thing is leaking from. I thought maybe the oil filter but that is dry. could it be the back of the valve cover gasket?? It leaks down the back of the engine so at first I thought it was the rear main seal, but then I saw the trail coming from up top. I would like to find and fix it, but has anyone had any luck with an oil leak sealer, and if so could someone recomend a good sealer if there is one. I don't like to put additives in any of my motors, but this things bugging the Shiznit out of me.