How to Fix Diesel Contamination in Engine Oil?
2 Answers
It is essential to verify whether the new high-pressure pump is leaking oil. Additionally, check if the pipelines are incorrectly connected and whether the engine runs smoothly. Otherwise, the issue might be with the fuel injectors. Replacing the pump can resolve the problem. Relevant details are as follows: 1. Advantages: Diesel engines offer the benefits of high torque and excellent fuel economy. The working process of a diesel engine shares many similarities with a gasoline engine, as each working cycle also involves four strokes: intake, compression, power, and exhaust. However, since diesel fuel is used in diesel engines, it has higher viscosity than gasoline and is less prone to evaporation. Moreover, its auto-ignition temperature is lower than that of gasoline. Therefore, the formation of the combustible mixture and the ignition method differ from those in gasoline engines. 2. Differences: The main differences include the fact that the mixture in the diesel engine's cylinder is ignited by compression rather than by spark. During operation, the diesel engine draws air into the cylinder. When the air in the cylinder is compressed to its maximum, the temperature can reach 500-700°C, and the pressure can reach 40-50 atmospheres.
I've been repairing cars for 20 years, and diesel getting into engine oil is one of the most common issues I've seen. It usually happens when the injector seal rings fail or the diesel pump leaks, allowing diesel to seep into the oil. If you notice the oil thinning, white smoke, or increased engine noise, stop driving immediately. Otherwise, the engine will wear out extremely fast and could even be ruined. For repairs, first drain the contaminated oil, inspect the oil pan and filter, then replace them with fresh oil and a new filter. The key is to test the fuel injectors—if they're leaking, replace them. In severe cases, you'll need to flush the entire lubrication system to prevent residual diesel from damaging components. Always monitor your oil condition and stick to regular maintenance, especially for older cars—prevention is better than dealing with major repairs. Don't delay; take it to a professional shop as soon as possible for a safe and hassle-free fix.
