What are the hazards of excessive engine oil to the engine?
3 Answers
The hazards of excessive engine oil to the engine are: 1. It may cause the crankcase to explode; 2. The engine exhaust pipe emits blue smoke; 3. Piston ring sticking and fuel injector clogging; 4. Reduced engine output power; 5. Oil leakage. The methods to deal with overfilled engine oil are: 1. Remove the oil seal screw to drain the oil; 2. Use an oil pump to extract the excess oil. The functions of engine oil are: assisting in engine lubrication and wear reduction, cooling and temperature reduction, sealing and leak prevention, rust and corrosion prevention, and shock absorption. The steps to change engine oil are: 1. Run the engine to reach operating temperature; 2. Engage the handbrake and lift the vehicle; 3. Unscrew the oil filter and drain the oil; 4. Apply new oil to the gasket of the new filter; 5. Pour new oil into the oil pan; 6. Check for leaks under the engine; 7. Lower the vehicle, check the oil dipstick, and start the engine; 8. Turn off the engine and recheck the oil level.
Engine oil dilution is no trivial matter. As someone who frequently works with engines, I've observed that when oil levels rise excessively, it's usually due to gasoline mixing in, which dilutes the oil and makes it thinner. This significantly reduces lubrication effectiveness, leaving critical components like piston rings and bearings inadequately protected, causing wear to increase rapidly. Over time, severe wear can lead to engine knocking, power loss, or even cylinder scoring and complete engine failure. Worse still, poor lubrication causes metal parts to generate friction heat, potentially triggering overheating issues. If left unchecked, the engine's overall lifespan could be halved. I once handled a vehicle where the engine required major repairs just months after oil dilution was detected, costing thousands in repairs. The workshop mechanic shook his head, saying early detection could have prevented this.
I remember a regular customer's car came in, and when we checked the dipstick, there was a lot of excess oil. The owner mentioned the car felt sluggish. Upon disassembly, we found the connecting rod bearings were completely worn out. After some questioning, we realized it was due to fuel dilution. When the oil level increases, the thickness of the lubricating oil film becomes insufficient. The engine internals then operate like gears grinding without oil, causing the bearings to fail quickly and the crankshaft connecting rods to deform. This eventually leads to oil leaks or engine knocking. Not only does this result in expensive repairs, but it also causes significant downtime. Having worked on cars for many years, I've seen numerous cases like this: neglecting inspections leads to major issues within just tens of thousands of kilometers. So don’t underestimate this problem—it’s a serious hazard. Get an oil change and maintenance done as soon as possible.
