The Main Causes And Solutions For Automobile Oil Seal Leakage

31 Jul.,2025

The Main Causes And Solutions For Automobile Oil Seal Leakage.As a key component to prevent lubricating oil leakage and external contaminants from entering the interior of the machine, the sealing performance of the oil seal is directly related to the stable operation of systems such as the engine, gearbox, and axle.

 

Main causes and solutions for oil seal leakage in automobiles

——NNK Oil Seal Factory takes you to a comprehensive understanding

In the process of automobile maintenance and use, oil seal leakage is a common but easily overlooked problem. As a key component to prevent lubricating oil leakage and external contaminants from entering the interior of the machine, the sealing performance of the oil seal is directly related to the stable operation of systems such as the engine, gearbox, and axle.

The Main Causes And Solutions For Automobile Oil Seal Leakage

Common causes of oil seal leakage:

1. Material aging or inferior rubber

Long-term high temperature or the use of inferior rubber materials causes the oil seal to harden, lose elasticity, and crack.

2. Improper installation

During the installation of the oil seal, the axis is offset, special tools are not used, and the installation angle is not correct, which will lead to poor sealing.

3. Shaft or housing wear

The shaft surface is scratched or rusted, or the housing processing accuracy is poor, resulting in an uneven seal contact surface.

4. Excessive oil pressure

The abnormal pressure fluctuation of the system exceeds the oil seal pressure range, resulting in deformation or damage.

5. Insufficient lubrication or foreign matter intrusion

The working environment of the oil seal is harsh, and the oil seal is operated in a state of mud, dust or lack of oil, causing the oil seal to wear out prematurely.

6. Mismatched model selection

The oil seal specifications do not match the working conditions, such as temperature resistance, pressure resistance, and incorrect material type selection, which will lead to failure.

The Main Causes And Solutions For Automobile Oil Seal Leakage

Solutions and prevention suggestions:

-Choose high-quality oil seal products

Choose products from regular manufacturers to ensure that the materials, processes, and structural designs meet the automotive sealing standards.

NNK oil seal factory uses imported rubber and precision steel skeletons to ensure that each product is wear-resistant, high-temperature resistant, and aging-resistant.

- Correct installation and operation

Use special tools to install, ensure that the oil seal is axially centered, the outer ring is pressed in flat, and avoid violent knocking and dry grinding.

- Regular inspection and maintenance

Regularly check whether there is leakage in the working part of the oil seal, whether the shaft is worn, and whether the system pressure is stable.

-Selection according to working conditions

Oil seals with corresponding materials (such as NBR, FKM, PTFE, etc.) and structural forms (TC, VC, SC, etc.) should be selected for different systems (such as engine crankshaft, gearbox, wheel hub, etc.).

-Dustproof design to enhance protection

Under high pollution and high load conditions, it is recommended to use double lip oil seals with dustproof lips or Cassette structure oil seals to improve durability.

The Main Causes And Solutions For Automobile Oil Seal Leakage

Advantages of NNK oil seal factory:

* More than 20 years of professional seal manufacturing experience

* Independent research and development of molds and precision production equipment

* Sufficient inventory of conventional models and fast delivery

* Support customization and technical selection services

* Exported worldwide, quality certified by ISO/TS

A small oil seal is the key to the safe operation of the entire vehicle.

Choosing NNK means choosing a longer-lasting and more reliable sealing guarantee!