What causes the clunking sound while the car is moving?
1 Answers
During driving, the engine may experience significant vibrations, and even when in neutral with the brake pressed, vibrations persist, especially noticeable during cold starts when the entire vehicle shakes. Body vibrations are essentially a warning signal, potentially indicating deformed wheel rims or unstable engine idle speed. Ignoring these signs could lead to major malfunctions. 1. Causes of vibrations during cold starts: Typically in colder weather, the absence of idle speed in cold conditions makes vibrations normal. However, if severe vibrations persist after the engine warms up and returns to normal RPM, it's advisable to check for a dirty throttle body. Maintenance and cleaning of the fuel system, throttle body, and air filter are recommended. 2. Causes of vibrations during acceleration: Acceleration-induced vibrations can cause the front of the vehicle to sway side to side. Therefore, the first step is to inspect whether the left and right half-shafts are bent and examine the inner walls of the left and right inner CV joints for wear and indentations, as these issues are often caused by damaged inner CV joints. 3. Causes of vibrations during gear shifting: Apart from improper clutch and throttle coordination, vibrations during gear shifting might stem from the vehicle itself, such as aging clutch discs, pressure plates, pilot bearings, or input shaft bearings. Hence, it's crucial to inspect these components. If these parts are indeed the issue, they could accelerate wear on transmission components, reduce their service life, and increase fuel consumption.
