What is the reason for the loud noise when the oil is changed?
December 15, 2021
The most important point in car maintenance is to change the oil. We will change it at different intervals according to the type of oil selected. Some riders reported that they felt that the accelerator was heavier after changing the oil, the car’s acceleration was weak, and the engine’s noise became louder. What is the reason?
Generally, the main reason for the loud noise is that the oil of the wrong viscosity is selected. For example, some places are relatively cold, if the low-temperature fluidity of the oil you replace is not good, it may cause the car's engine to become noisy. Or change to a higher-viscosity oil, then when your engine is running, the resistance it encounters will increase. At this time, you will feel weak in acceleration, and the car will roar after it runs.
Generally, 20 and 30 viscosity oils are suitable for Japanese and Korean cars, and 30 and 40 viscosity oils are suitable for European and American cars. Specifically, you still have to choose the oil that suits you according to the car's maintenance manual, or open the oil cap, and the table will indicate what type of oil is suitable. Or consult the store customer service about what viscosity oil is suitable for yourself. Another possibility is that the engine oil has been added. We generally add the oil to the middle of the oil dipstick a little bit above the middle of the oil dipstick, but if you add too much oil, too much oil will increase the running resistance of the engine's internal parts and cause unnecessary power loss-the engine More power is needed to overcome the resistance brought by the oil. At this time, you will feel the sound inside the engine become louder, and then run up and accelerate weakly.
In addition, excessive lubricating oil will flee into the combustion chamber, the engine will burn engine oil, exhaust emissions will exceed the standard, blue smoke will be emitted, the oil consumption will increase significantly, the internal carbon deposits in the engine will increase, and even pre-ignition, knocking, cylinder pulling, and serious damage to the engine .
