A Series Diesel Engine Lubricating System Flow 119
During operation the oil pressure will be higher than
coolant pressure. A leak in the oil cooler will show as
oil in the coolant.
However, following an engine shutdown, the residual
pressure in the coolant system can cause coolant to
seep through the leak path into the oil.
Fuel Diluted Oil
Fuel dilution is limited to four sources:
1. Injection pump shaft seal
2. Fuel leaking by the rings
3. A crack in the cylinder head from the fuel
filter location to the air intake.
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