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Figure 3: Sealing function of main lip radial load
* KOYO is a registered trademark of JTEKT.
Figure 4 shows the features of a JTEKT oil seal.
Auto Head Gasket: Importance in Engine Functionality
Even though it’s better than other materials in terms of toughness and wear time, it is preferably used in dry-running applications. The salient demerit of this material is its cost.
■Rust and corrosion inhibitors: Your engine’s internal parts can rust and corrode when exposed to acids and moisture. These additives create a protective film over your engine’s internal parts to help prevent such damage.
Material Selection:
First, an elastomer, most often nitrile, is vulcanised to a metal ring. This creates a stiffening effect that includes a specialised metal tension spring directly behind the sealing lip, keeping the oil seal firmly in place against the moving part.

Conventional oil seals
Oil seal WG1087811 is used by several automotive manufacturers, such as Opel, Fiat and Suzuki, and serves as a good example for an oil seal where oil leakage can occur if fitted incorrectly.
The lip is specially designed to ensure the oil seal works effectively with the different forces that arise during rotation. Many different designs and materials are used, so countless types of oil seals are available. These are chosen according to the application; pumps, gearboxes, wheels, and many other rotating applications where fluids need to be sealed. They are used in a variety of sectors, such as the chemical industry, manufacturing, wind turbines, automotive sector, food industry, and more. Oil seals are used in nearly all sectors.