What Engine Sounds Are Normal?

1 Answers
LaJason
07/29/25 3:51pm
Engine idle sounds that are uniform and free of abnormal noises are normal. An engine is a machine capable of converting other forms of energy into mechanical energy, which can be categorized into: 1. Internal combustion engine: Fuel burns inside the engine; 2. External combustion engine: Fuel burns outside the engine; 3. Gas turbine: Combustion produces high-pressure gas, which drives the turbine blades to rotate; 4. Jet engine: Generates thrust directly by the high-speed jet of gas from the nozzle. Reasons for increased engine noise include: 1. Engine oil not meeting standards or being overfilled, increasing the stirring resistance of the crankshaft and connecting rod; 2. Unsuitable oil viscosity; 3. Excessive engine carbon buildup, intensifying wear on cylinders and pistons; 4. Mixing different brands of engine oil; 5. Not changing the engine oil on time.
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