Why is the car loud when starting?

[StellaMarie]

It is normal for a car to be loud when starting because the engine oil pressure takes time to build up during a cold start, resulting in poorer lubrication and thus louder noise. Here are some relevant details: 1. Cold start: After a cold start, the engine idles at a higher speed to reach the normal operating temperature quickly, which makes the noise seem louder. The noise will gradually decrease and disappear as the idle speed drops. After a cold start, the engine sound is louder, and when the car is parked, the engine oil will automatically flow back to the oil pan. 2. Hot start: If it is a hot start, the engine oil is already in place, providing good lubrication and sealing, so the noise will naturally be smaller. Therefore, it is best to warm up the car for 1-3 minutes in the morning during winter.