What Causes Loud Engine Noise During Acceleration?
2 Answers
Reasons for loud engine noise in cars: 1. Engine oil: If the viscosity of the vehicle's engine oil is too high, it can easily cause operational issues in the engine, reducing lubrication effectiveness and leading to louder engine noise. 2. Belt: Check if the belt is loose. A loose belt can sometimes cause increased noise in the engine compartment. 3. Water temperature: Excessively high water temperature can also cause loud engine noise. Check if the temperature gauge is normal and if there is any smoke coming from the engine compartment. It's crucial to replace the coolant before winter. 4. Idle speed: If the noise feels particularly loud during idle and the idle speed is higher than usual, it may be necessary to clean the throttle body, intake tract, and fuel injectors, especially the throttle body. 5. Sound insulation: If the engine sounds normal from outside but feels noisy inside the car, it indicates poor sound insulation. Check the vehicle's sealing strips for signs of aging. Alternatively, improving the vehicle's sealing effectiveness and then testing the noise level is recommended.
When driving for a long time, you often encounter loud acceleration noise, mostly caused by poor oil maintenance. When I was young, I drove recklessly without changing the oil, resulting in rough engine operation and loud noises. Later, I learned that insufficient or deteriorated oil can worsen lubrication and increase piston friction. A loose belt tensioner is also a culprit, causing the belt to squeal during acceleration. As the car ages, increased valve clearance or worn connecting rods can also amplify the noise. It is recommended to regularly check the oil dipstick to ensure the oil level is normal, and don’t forget to change the oil before long trips. Otherwise, the noise will increase and it can easily damage the engine, increasing repair costs—just hearing it is heartbreaking.
