What causes the engine to be very loud when the car just starts?
2 Answers
The main reasons why the engine is very loud when the car just starts are as follows: 1. When the vehicle is started cold, the temperature of various internal components is very low, and the engine oil inside the vehicle has flowed back into the oil pan due to prolonged parking, thus significantly increasing the starting noise. 2. During a cold start, the vehicle's RPM is much higher than normal, so the accompanying noise will also be relatively loud. Below are some related explanations: 1. It is normal for the vehicle to produce loud noises during a cold start, and there is no need to worry excessively. As the temperature of each component rises to the normal operating range, the noise will gradually decrease or even disappear. 2. If you are particularly concerned about the noise when the vehicle starts, you can take measures such as keeping the RPM around 1000 when the car just starts and avoiding high-speed driving for the first 5 minutes or so, which can minimize the noise to the greatest extent.
Every morning when I start my car, the engine makes an extremely loud noise, like thunder, which makes my neighbors glare at me. This is quite common, mostly because when the weather is cold, the oil inside the engine hasn't warmed up yet, leading to insufficient lubrication and increased friction noise between parts. Another possible reason is that the engine oil has been used for too long and its viscosity is insufficient, the oil change interval hasn't been followed, or the wrong type of oil was used. Sometimes, it's due to aged or loose belts, such as the timing belt, which squeals during startup. I suggest warming up the car for a few minutes before driving, and the noise should decrease. If the noise persists, check the oil dipstick to see if the oil level is normal to avoid more serious issues. Ignoring this problem for a long time may increase engine wear, cause premature part failure, and waste both fuel and money. It's best to perform regular maintenance and choose the correct oil type, generally checking every 5,000 kilometers.
