What are the reasons for loud car noise?
1 Answers
Car engine noise can be caused by the following reasons: 1. Oil issue: If the vehicle's engine oil viscosity is too high, it can easily lead to operational problems in the engine, reducing lubrication effectiveness and resulting in loud engine noise. Therefore, it is necessary to promptly visit a repair shop to check if the oil needs to be replaced. 2. Loose belt: Check if the belt is loose. Sometimes, a loose belt can cause the noise in the engine compartment to increase. 3. High water temperature: If the engine noise is loud, it could also be due to high water temperature. Check if the temperature gauge is normal and if there is any smoke in the engine compartment. It is essential to ensure the coolant is replaced before winter. 4. Idle speed: If the noise feels particularly loud during idle and the vehicle's idle speed is high, it is likely that the throttle body, intake duct, and fuel injectors need cleaning. 5. Poor sound insulation: If the engine sounds normal from the outside but the noise feels loud inside the car, it indicates poor vehicle sound insulation. Check the vehicle's sealing strips for any signs of aging. Alternatively, improve the vehicle's sealing effect and test the noise level again.