What Causes the Rattling Noise When a Car Starts Moving?

[StArabella]

Due to excessively low engine oil temperature and ambient temperature, abnormal noises occur when the car starts moving. Here are the detailed explanations: 1. When the engine oil temperature is too low, various components inside the engine lack lubrication, resulting in increased friction between parts, which leads to abnormal noises. This is a normal phenomenon; 2. Engine oil is referred to as the lifeblood of the engine. Inside the engine, it not only serves as a lubricant but also performs functions such as cleaning, sealing, cushioning, rust prevention, and heat dissipation. Without engine oil, the engine cannot operate normally.