Truck Repair: cummins engine, fuel injection pump, cummins engine

Question
CLIFF                                                I HAVE 8.3 CUMMINS 210 HP FORD TRUCK RECENTLY I FOUND DIESEL FUEL IN MY ENGINE OIL I CHANGED OIL AND FILTERS 2 OR 3 TIMES AND STILL HAVE DIESEL IN MY OIL ANY IDEAS    THANKS BOB  

Answer
If it is a manual engine,my first choice would be the transfer pump on the drivers side that the camshaft operates.The second and less likely a problem is the frt seal on the fuel injection pump.If it is an ISC(electronic engine),the fuel pump accumalator module is the only part that has fuel & oil together.A head on the ISC is a suspect,but never seen that before.