What are the main types of automotive oil seals

The function of the oil seal is to isolate the parts that need lubrication in the transmission components from the external environment to prevent lubricant leakage. The following is the specific location of the oil seal:

 

Oil seals are mainly installed near the engine, transmission, drive axle and other components of the car.

The function of the oil seal is to isolate the parts that need lubrication in the transmission components from the external environment to prevent lubricant leakage. The following is the specific location of the oil seal:

 

Valve oil seal: installed on the upper end of the valve guide in the engine cylinder head.

The valve oil seal is generally made of an outer frame and fluorine rubber vulcanized together. A self-tightening spring or steel wire is installed at the diameter of the oil seal, which is used to seal the engine valve guide rod.

The valve oil seal can prevent engine oil from entering the intake and exhaust pipes, avoid engine oil loss, prevent the mixture of gasoline and air and exhaust gas from leaking, and prevent engine oil from entering the combustion chamber. The valve oil seal is one of the important parts of the engine valve group. It comes into contact with gasoline and engine oil at high temperatures, so it needs to be made of materials with excellent heat resistance and oil resistance, generally made of fluorine rubber.

 

 

Crankshaft front oil seal: located on the engine belt side.

The front crankshaft seal is an oil seal located at the front of the engine crankshaft. It is a critical component that prevents oil from leaking from the engine as the crankshaft rotates.

The front oil seal is usually made of rubber or silicone and is designed to withstand the high temperatures and pressures found within the engine. It is mounted in the housing and uses a spring to press against the rotating crankshaft. The outer edge of the seal is fixed and connected to the engine block, while the inner edge is in constant contact with the rotating crankshaft.

 

 

Crankshaft rear oil seal: located at the connection with the gearbox.

The crankshaft rear oil seal is located at the connection between the engine and gearbox.

This part is usually located near the bottom center of the engine, next to the crankshaft. The function of the crankshaft rear oil seal is to seal the crankshaft end of the engine flywheel to prevent the leakage of lubricating oil. If the crankshaft rear oil seal is damaged or aged, it may cause engine oil leakage and affect the normal operation of the engine.

 

Half-shaft oil seal: Located on the car's drive axle (the drive shaft of a front-wheel drive or rear-wheel drive car), it is a seal connected to the differential housing and axle shaft.

 

In addition, there are other oil seals such as camshaft oil seals, balance shaft oil seals, etc., which are distributed in different parts of the car to jointly ensure the efficiency and integrity of the lubrication system.