What Causes the Abnormal Noise When Accelerating?
2 Answers
It may be caused by an improperly installed air filter or an issue with the oil-gas separator. It is recommended that the owner take the vehicle to a repair shop for inspection. The relevant details are as follows: 1. Unfiltered Air: During operation, the engine needs to draw in a large amount of air. If the air is not filtered, the dust suspended in the air can be drawn into the cylinders, accelerating the wear of the piston group and cylinders. Larger particles entering between the piston and cylinder can cause severe "cylinder scoring," which is particularly common in dry and sandy working environments. The air filter is installed in front of the carburetor or intake pipe to filter out dust and sand particles, ensuring that sufficient and clean air enters the cylinders. 2. Oil-Gas Separator: Pull out the oil dipstick slightly to check. If the noise disappears, it may be an issue with the oil-gas separator. If the noise persists, it is likely related to the clutch, and further inspection is recommended. The sound of compressed air flow produced by the turbocharger during operation is normal. The higher the engine speed or the deeper the accelerator pedal is pressed, the louder the engine noise becomes. When pressing the accelerator, do so gently and avoid pressing it all the way down suddenly, as this can cause such noises.
A few days ago, I also encountered abnormal noises when accelerating while driving. The sound was like knocking or creaking, which was quite unsettling. There are usually many possible causes for this issue, with the most common being faults in the engine ignition system. For example, carbon buildup on the spark plugs can lead to uneven combustion, causing irregular explosions of gasoline in the cylinders, which produces abnormal noises. Another common cause is the transmission system, such as worn-out gearbox gears or a slipping clutch, which can easily produce creaking sounds under the increased load during acceleration. Additionally, leaks in the exhaust system can cause hissing sounds, especially in older cars where rubber gaskets have deteriorated. Loose belts or worn bearings are also frequent culprits, as the increased RPM during acceleration makes the noise more noticeable. When I was younger and driving in the countryside, several instances of abnormal noises turned out to be belt-related issues. If not fixed promptly, they could damage more components. For safety's sake, it's best to have it checked by a professional repair shop as soon as possible to avoid bigger problems down the line.
