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• SIM method to prevent the spring from falling off (integral molding of spring and rubber)

Seals are designed to create a tight seal around the shaft by utilising a combination of lip geometry, surface tension, and lubrication. When the shaft rotates, the lip of the oil seal comes into contact with the shaft surface, creating a frictional force that generates heat. This heat helps to soften and conform the elastomeric material of the oil seal to the shape of the shaft, ensuring an effective sealing action.

front hub oil seal. Most mechanics recommend replacing the front hub oil seal every 60,000 to 80,000 miles, but this can vary depending on your driving habits and the conditions in which you drive.
Based on the application of the oil seal, the outer skin layer tends to differ. Here are some types of the materials used for the outer skin of the oil seal.
1、For the factory
For more detailed information, please see the following:
Names and functions of seal components
Rotary Wheel Of Auto Parts

front valve cover gasket. Once the old gasket is removed, the new gasket can be installed and the valve cover reattached to the cylinder head.
Type