I suspect I have an internal diesel fuel leak which is contaminating the engine oil and overfilling the sump. I drained 12 liters of oil from the engine (expected just under 7 liters). The oil didn't smell too much of diesel, but did appear to be thinner than usual (although both hard to tell).
Questions:
- 1. Are the fuel pumps known to leak diesel into the timing case (and therefore, sump)?
2. Other than the fuel injector lines, fuel return lines and the fuel pump, is there any other way diesel can get into the sump?
Vehicle:
- 2006 Hilux, KUN26R, 3.0 D4D (1KD-FTV)
Any advice appreciated.