JohnStuddard Posted January 6, 2016 Share Posted January 6, 2016 I have a 99 e7 460 getting fuel in the oil . going to change eup orings anything else I should look for Quote Link to comment https://www.bigmacktrucks.com/topic/43402-fuel-in-the-oil/ Share on other sites More sharing options...
Brian Blaylock Posted January 6, 2016 Share Posted January 6, 2016 Hole in piston Quote Link to comment https://www.bigmacktrucks.com/topic/43402-fuel-in-the-oil/#findComment-318833 Share on other sites More sharing options...
hatcity Posted January 6, 2016 Share Posted January 6, 2016 most likely the O-ringsreplace hold down bolts at the same time.may have to bar engine over to get some in placechange oil and filters Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/43402-fuel-in-the-oil/#findComment-318856 Share on other sites More sharing options...
Challenger Posted January 6, 2016 Share Posted January 6, 2016 1-Fuel pump leaking fuel past the shaft into the engine. 2-There is a fuel galley plug under the front engine cover. Its under the cover mounting surface. They can come loose and leak. Removing the oil pan, pressurizing the fuel system and looking for the leak is the only way to find it. Quote Link to comment https://www.bigmacktrucks.com/topic/43402-fuel-in-the-oil/#findComment-318857 Share on other sites More sharing options...
Refined Trucker Posted January 6, 2016 Share Posted January 6, 2016 I had a new EUP that was leaking fuel internally down into pan. Pressurized fuel system and dropped pan was the only way we located it. That turned into a costly deal just goes to show you can't count on new parts either. Quote Link to comment https://www.bigmacktrucks.com/topic/43402-fuel-in-the-oil/#findComment-318871 Share on other sites More sharing options...
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