What Causes Abnormal Noises When a Car is Running?

[LolaDella]

Abnormal noises during car operation occur due to the numerous components in a vehicle, which can experience aging, loosening, or mechanical issues. Below are specific explanations: 1. Aging or loosening of car parts: Noises can be caused by the engine guard plate, especially metal ones. These are often due to minor undercarriage scrapes that deform the guard plate, leading to collisions and friction between the exhaust pipe and the guard plate when accelerating or driving on bumpy roads. Additionally, excessive engine valve clearance, wear, or aging of engine belts or pulleys can also produce abnormal noises. 2. Mechanical component issues: If abnormal noises are heard while driving, it's advisable to stop and inspect the vehicle to ensure everything is normal before continuing. Particularly loud noises, especially those coming from the engine area, should prompt immediate cessation of driving. These noises typically indicate mechanical problems, and continuing to drive could damage the vehicle or compromise safety.