What Causes Loud Car Noises?

[McGianna]

There are several reasons for loud car noises, including unsuitable engine oil, aging and loose belts, excessively high water temperature, dirty and clogged intake systems, poor sound insulation, etc. Different issues require corresponding inspections and repairs. Unsuitable engine oil: If the oil viscosity is too high and lubrication deteriorates, it may cause loud engine noise. Promptly visit a repair shop to check whether the oil needs replacement. When changing the oil, always choose the type suitable for your car's engine and ensure the oil quality. Aging and loose belts: Check if the belts are loose. Sometimes, loose belts can increase noise in the engine compartment, requiring belt tightening. If the looseness is due to belt aging, replace the belt promptly. Excessively high water temperature: Loud engine noise may result from high water temperature. Check if the temperature gauge is normal and whether there is smoke in the engine compartment. If the water temperature is too high, do not drive the vehicle. Park it in an open area and open the radiator to cool it down. Additionally, ensure the coolant is replaced before winter. Dirty and clogged intake system: If the noise is particularly noticeable when the vehicle idles at high RPM, it may indicate clogging in the throttle body, intake ducts, or fuel injectors, requiring cleaning. Poor sound insulation: If the interior noise is excessive, it suggests poor sound insulation. Check if the vehicle's sealing strips show signs of aging. If so, reseal or add soundproofing materials.