What is the engine oil seal

Engine oil seal is a device used to seal the oil inside the engine, mainly used to prevent the oil from leaking out of the engine. It is usually located in the crankcase (also known as the oil pan) and the CAM axle case (also known as the valve cover) of the engine.

The design and structure of the engine oil seal can vary according to different engine types and manufacturers, but basically includes the following main parts:

1. Shell: Usually made of rubber or rubber composite material, it has softness and wear resistance to ensure good sealing performance.

2. Spring: located inside the oil seal, it is used to provide pressure and tight connection to ensure close contact between the oil seal and the shaft.

3. Shaft sleeve: located inside the oil seal, it is used to protect the oil seal from the external environment and provide close contact with the shaft.

The working principle of the engine oil seal is that through the close contact between the oil seal and the shaft, a sealed isolation layer is formed to prevent the oil from leaking out of the engine. When the engine is running, the rotating shaft generates friction and heat, and the oil seal acts to prevent the loss of lubricating oil.