What's the abnormal noise of this car?

Because the oil temperature is too low and the ambient temperature is too low.

When the oil temperature is too low, all parts in the engine lack lubrication. At this time, the friction between the internal parts of the engine is relatively large, so there will be some abnormal noises, which is normal.

Engine oil is called the blood of an engine. Engine oil not only plays the role of lubrication, but also plays the role of cleaning, sealing, buffering, rust prevention and heat dissipation. If there is no oil in the engine, the engine will not run normally.

When the engine is running, the engine oil will form an oil film on the surfaces of the components in the engine, which can prevent the components in the engine from directly contacting and generating friction.

If the parts in the engine directly contact and produce friction, it will aggravate the wear of the engine, and it will also cause the engine to generate a lot of heat in an instant, which is fatal to the engine.

Common abnormal noise of automobile

1 Abnormal sound of constant velocity joint: constant velocity joint, commonly known as ball cage, is mainly used to transmit power and complete steering. If the constant velocity joint is badly worn and the vehicle makes abnormal noises such as "rattle" when driving, just confirm where the abnormal noises are and then replace the constant velocity joint.

2. Abnormal sound of wheel bearing: The function of wheel bearing is to connect the vehicle and the tire. Regardless of the size of the tire, the connection between the vehicle and the tire depends on a small hub bearing. If the hub bearing is damaged, the tire will run off or even fall off. When the vehicle is driving, it will make a continuous abnormal sound similar to "buzzing".

3. Abnormal noise of exhaust pipe: Abnormal noise of exhaust pipe is generally caused by rupture or air leakage of exhaust pipe. When the vehicle starts, it will make a "poof" sound. It may also be caused by damage or blockage of the three-way catalyst. Its function is to reduce noise while purifying waste gas. If the damage can't achieve the effect of noise reduction, abnormal noise is inevitable.