RockinRob

Thanks for the for the reply, this is driving me nuts. I guess the hoods coming off, Idon't see a way to check that plug without taking the the front of the truck off. Hood, air to air, radiator etc.

I have e7 460 mack. I have fuel in my oil. A lot of fuel! The popular response from EVERYONE was change your o-rings on your unit pumps. After I changed o-rings on the unit pumps. I drove 200 miles and I have about a gallon of fuel in oil. I took oil pan off and pumped the hand primer to see where it was coming from, but all pressure leaks out when you stop pumping. You would think this would be a pretty big leak and easy to find, but all I can see is a little drip coming down between the end of the steel block and the bottom of the timing cover. I wipe it away and awhile later it is back. You can't see passed the timimg gears so I don't know where it is coming from. Iknow there is a plug in the front of the block ( behind the timing cover ) that is at the end of the fuel resevoir that the unit pumps sit in. Did anyone ever hear of that plug leaking? I think if it is leaking it would be a big leak only when the fuel system is pressurized, like under driving conditions. I checked the fuel transfer pump and its not leaking. I think if I can pressurize the system with air, it will blow the fuel out fast enough so I can see it. Anybody got any good ideas? Anybody ever hear of that plug leaking? This is my first post. Ever.