Ok. Yes, the Lb7's are under the covers. I have kept a cloooose eye on the engine oil twice a day for 'making oil" where the fuel would be going into the head and to the engine oil. So far, so good. No fuel in oil at all.since they were done not too long ago, you might get lucky and find a pressure line fitting simply loose at one of the injectors or at the rail. IDK if they are under the valve covers or if they are out on the head like ours. if under the covers, look for a "clean" spot around the line nut where diesel has washed away oil in that area.