Diesel fuel in crankshaft

Cause Correction
Engine mounted fuel lift pump seal or diaphragm ruptured - rapid dilution Replace/repair engine mounted lift pump
Injection pump seal(s) ruptured - rapid dilution Remove injection pump and repair/replace
Injection nozzle(s) stuck open - slow dilution Test/replace injection nozzle(s) * Treat fuel with fuel conditioners such as Stanadyne lubricity formula
Engine valve train components malfunction i.e. broken rocker arm or bent push rod ect. Repair the necessary engine components