Under What Circumstances Does an Engine Need an Overhaul?

[JulietAnn]

An engine needs an overhaul under the following circumstances: 1. Severe oil consumption with blue smoke emission, but no oil leakage; 2. Heavy black smoke emission from the engine; 3. Knocking sounds from the connecting rod bearings (big and small ends), severe wear of small bearings, and significant crankshaft wear; 4. Scuffing noises indicating severe damage between pistons and cylinder walls. The engine is the device that provides power to the vehicle, determining its performance, fuel efficiency, stability, and environmental friendliness. Methods for maintaining a car engine include: 1. Regularly changing engine oil and filters; 2. Using lubricants of appropriate quality grades; 3. Periodically cleaning the radiator; 4. Maintaining the three filters (air, oil, and fuel); 5. Ensuring good crankcase ventilation; 7. Regularly cleaning the crankcase; 8. Periodically cleaning the fuel system.