What is the reason for the metal friction sound when releasing the accelerator?
2 Answers
The main reasons for the metal friction sound when releasing the accelerator are two points. The following is a detailed introduction about these two reasons: 1. Transmission abnormality: The car transmission is a set of speed-changing devices used to coordinate the engine speed and the actual driving speed of the wheels, in order to achieve the best performance of the engine. The transmission can produce different speed ratios between the engine and the wheels during the car's driving process. 2. Engine carbon pollution: The engine (Engine) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc.
When driving, I've encountered a metallic friction sound upon releasing the throttle several times. A common cause is component friction during engine braking. When the throttle is released, the engine load decreases. If there's internal wear, such as excessive piston ring clearance or valve issues, it can produce a squeaking sound. Similarly, wear in the transmission system, like the clutch or gear synchronizer, can also cause this, as the sudden pressure change upon throttle release intensifies friction. Don't ignore this issue; prolonged neglect can lead to engine cylinder scoring or transmission damage. I recommend first identifying the sound source, such as whether it's coming from the engine bay or the chassis, and promptly visiting a professional shop for a diagnostic tool check to prevent minor faults from turning into major repairs. Additionally, avoid aggressive driving to minimize wear.
