What Causes Abnormal Noise When Starting a Car?
1 Answers
Abnormal noise when starting a car may be caused by clutch failure, transmission failure, lower arm failure, or inner CV joint wear. It is best to have it inspected and repaired at a local 4S shop or professional repair shop. Here is some relevant information: 1. Normal noises: Various vibrations from the car's mechanisms during operation can produce different types of sounds. However, the presence of noise does not necessarily indicate a fault. To avoid unnecessary disassembly, it is important to distinguish between normal and abnormal noises. Normal vibration sounds from various system components (such as noise from the engine surface), gear impact sounds during shifting, intake and exhaust sounds from gas-operated sources, and gear meshing noises are all considered normal. 2. Abnormal noises: Abnormal noises can be categorized into minor, moderate, and severe based on their impact on the car's performance. Minor noises, such as sparking from high-voltage electrical leakage or slight looseness in rolling bearings, are generally low in volume and cause minimal wear to components. Moderate noises, such as flywheel bearing noise or clutch release bearing noise, significantly affect the car's performance but can still maintain its main technical functions in the short term. Severe noises, such as loud crankshaft or connecting rod bearing noises accompanied by a drop in oil pressure, pronounced gear clashing in the transmission, or strong differential vibrations, have serious effects on the car and may lead to or already have caused severe damage to components.
