It is important to regularly inspect and replace worn-out piston oil seals to ensure the proper functioning of the engine. This can help to prevent costly repairs and extend the life of the engine.


However, the new variant also comes with less good properties. Namely less flexibility and less resistance during assembly. Most damages therefore occur during the installation of PTFE oil seals.
• Fluorine rubber


Use an old screwdriver or scraper to carefully remove all traces of the old gasket from the cover and engine flanges.
Most standard oil seals have to comply with the DIN 3760 and ISO 6194 standards. Different standard types of oil seals are available that comply with these requirements.


Rubber type
PTFE material is a perfect ingredient in making more reliable oil seals. These materials are used to make oil seals that can resist dry or unlubricated operations. PTFE oil seals, which are also called teflon oil seals, have a thermal strength ranging from -202 degrees Fahrenheit to 392 degrees Fahrenheit and an excellent chemical resistance. Oil seal PTFE is considered as the future of radial shaft seals.
Seals are classified by O.D. wall material, lip type, and whether they have a spring or not.
Major oil seals are specified in ISO 6194-1 and JIS B 2402-1.
Table 2 shows the common types of oil seals, while Table 3 shows the features of each type of oil seal.
Table 4 lists the JTEKT oil seal type codes and corresponding ISO and JIS standards.
Viton Oil Seals - A synthetic rubber and fluoropolymer elastomer, Viton is used to make oil seals that provide resistance in both high temperature, up to 250°C and low compression set components. They also offer a high resistance to chemicals and abrasions, so they can be used in elements that regularly interact with petroleum and solvents.
Dynamic seals called bearing isolators are used to shield bearings from external impurities. They are revolving (rotor) and stationary (stator) elements. O-rings or strong seals are used in some bearing isolators, while they are constructed like labyrinths in others.
How to Choose the Right Oil Seal
