Why Does the Engine Sound Louder When Starting the Car in Summer?
3 Answers
Summer starting car engine sound loud reasons are as follows: 1. Aging sealing strips: The engine noise of the car is getting louder and louder, possibly because the sound insulation effect of the car has deteriorated. When the doors and windows of the car age, the sound insulation effect becomes much worse. Originally, the engine sound could not be heard inside the car, but after the sealing strips age, it can also be heard. In this state, not only the engine sound can be heard, but also the noise outside the car can be transmitted into the car. 2. Check the engine oil: If it is not a problem with the sealing strips, then the engine oil should be checked. The main function of engine oil is to lubricate the engine. If the engine oil is overused or deteriorated, it may affect the lubrication effect of the engine, resulting in increased noise.
In my over ten years of driving experience, I've noticed that louder engine noise during cold starts in summer is quite common. Primarily, high temperatures make engine oil thinner, reducing lubrication effectiveness and increasing internal friction, which naturally amplifies the sound. Additionally, turning on the AC adds extra load, and the fan operation contributes to the noise. Minor issues like loose belts or aging fan bearings can also become more pronounced. For regular maintenance, I recommend using higher viscosity oil to adapt to hot weather, routinely checking the cooling system and fan belts, and addressing issues before they become abnormal. Waiting a minute or two after starting the engine before turning on the AC can help alleviate this situation. If the noise remains excessively loud or is accompanied by vibrations, it's crucial to visit a repair shop immediately to prevent compromising driving safety.
As a car enthusiast, I always pay attention to engine health. The loud startup noise in summer can indeed be annoying. High temperatures improve oil fluidity but reduce lubrication; the AC compressor momentarily increases engine RPM upon startup; fans may also produce abnormal sounds due to dust accumulation or bearing wear. For routine maintenance, I prefer using season-appropriate engine oil like 5W-30 high-viscosity oil; cleaning dust from the radiator; and checking belt tension. Before driving, avoid sudden acceleration or turning on the AC immediately - let the engine warm up briefly. These small steps can reduce noise and protect the engine. Long-term neglect may accelerate component wear and increase repair costs.
