What Are the Reasons for Increased Engine Noise After Maintenance?

[Carson]

The reasons for increased engine noise after maintenance are: 1. Using engine oil of a different brand; 2. Using engine oil of the same brand but a different grade; 3. Excessive carbon buildup in the car, overfilling of engine oil, or incomplete removal of old engine oil. The function of an engine is: to convert the thermal energy of gasoline or diesel into mechanical energy by burning the fuel in a sealed cylinder, causing the gas to expand and push the piston to perform work. Methods for engine maintenance include: 1. Regularly changing the engine oil and filter; 2. Using lubricating oil of appropriate quality grade; 3. Regularly cleaning the radiator; 4. Regularly replacing the air filter, oil filter, and fuel filter; 5. Maintaining good ventilation in the crankcase and cleaning it periodically; 6. Regularly cleaning the fuel system.