Im getting oil in my diesel and vice versa - Ford Powerstroke Diesel Forum
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Old 04-03-2009, 08:33 AM
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Im getting oil in my diesel and vice versa

I have a 2003 7.3L Powerstroke with about 114,000 miles on it. I noticed that it was starting to use quite a bit of more oil than normal. I checked for leaks and assumed it was probably burning it since it wasnt leaking any. Then one day the truck died on me. I couldnt figure out what was wrong with it so i took my fuel filter out thinking maybe it was plugged up. I pulled the filter out of the housing and it was completely covered in oil. I drained my fuel tank completely and pulled my dipstick out and rubbed the oil on my fingers and it smells like it has diesel in it also. Im not sure how this happened and everyone i have asked about it has no idea. Finally someone told me it could be my injectors. So i replaced them, but i still have the same problem. I changed the oil and my fuel filter when i changed the injectors out and my fuel filter already has more oil on it and there seems to be diesel in my oil again. The only other thing that i can possibly think of would be my injector sleeves but i wanted to get some advice before i spent the money to try and fix it because i dont wana end up wasting my time and money like i did with my injectors. Thanks for the help.

Last edited by cavemen_65; 04-03-2009 at 09:26 AM.
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Old 04-03-2009, 10:59 AM
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What causes the oil in the fuel filter is the injector o rings getting weak and the oil goes around the ring into the fuel return passage which in turn goes to the fuel filter. Also if you installed the middle pink o ring incorrectly and tore it in the process it will also cause the oil, also if the injector bore was dirty when you installed the injector it could of cut the o ring. Usually if the injector cup is cracked or damaged it will fill the coolant over flow with diesel fuel. I would recheck the o rings on the injectors. Did you install them your self?
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Old 04-04-2009, 10:51 AM
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Ya i installed them myself but the old injector rings didnt really look that bad so i assumed it would have to have been my injector sleeves.
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