Valve stem oil seals for cars 90913-02066

NNK FKM valve stem oil seals for cars 90913-02066

Product Identifiers

Valve stem seals control the lubrication of the valve stem as it slides in the valve guide. Too little oil causes stem and guide wear. Too much oil increases oil consumption and can cause a buildup of carbon, leading to valve seat damage and an early valve grind. Faulty valve stem seals increase oil consumption.Valve stem seals provide a defined metering rate of oil to the valve stem interface of internal combustion engines to lubricate the valve guide and minimize engine emissions. They are available for diesel and gasoline engines with and without boosting.

NNK FKM valve stem oil seals for cars 90913-02066

Non-integrated seal: fulfills the function of oil metering
Integrated seal: additionally incorporates a spring seat to prevent wear on the cylinder head
The optional low friction design features of SKF's high pressure valve stem seals can be incorporated into all available seal designs without any changes to existing installation equipment. Our new rubber material can even withstand the most aggressive oils in the market.

NNK is a brand of NOK-CN factory. Standard seals are developed or used according to specific customer requirements. All products use professional technology to ensure maximum sealing performance while reducing friction. NNK stem oil seal has excellent chemical resistance and temperature resistance . Consistent oil metering and long service life for optimal valve lubrication and minimal engine emissions.

Valve stem seals are made from a variety of materials, including nylon, PTFE rubber, steel, and synthetic rubber. Sometimes these materials are combined into a single sophisticated design.

Features

Optional beaded lip design feature to provide lowest friction and power loss
Development to specific customer requirements
Consistent oil metering
Excellent resistance to oils/fuels and high temperatures
Benefits

Long term emissions control 
Long service life
Optimum valve lubrication 
Minimum valve guide wear for maximum valve train life

The function of the valve stem seal
Valve stem seals are installed in the valve guides and slide to control valve stem lubrication. Too little oil can cause stem and guide wear. Too much oil can increase oil consumption and cause carbon deposits, which can lead to valve seat damage and premature valve wear. At the same time, if the valve stem seal is damaged, it will also increase the fuel consumption.

NNK valve stem seal design:
Positive seals : Attach to the valve guide boss. They work like a squeegee, wiping and metering oil on the stem as it passes through the seal.
Deflector seals: Deflect oil away from the valve stem. Also called umbrella seals, they move with the valve stem to shield the valve guide from excess oil.
Stem Seal Materials: Nylon, Teflon, Steel, and Synthetic Rubber (NBR, Polyacrylate, and Viton).
Apply to
DAIHATSU，ISUZU，MAZDA，MITSUBISHI，NISSAN，TOYOTA ，SUZUKI，KOMATSU，DAEWOO，HYUNDAL，BMW

NNK and valve stem seals：
In order to prevent premature hardening and rupture due to insufficient heat resistance of rubber seals, NNK guarantees the service life and ensures that the engine is in a lubricated state. The materials we choose are based on the use environment of the seals and the characteristics of the materials themselves. The oil seals produced have high-quality properties such as high temperature resistance, wear resistance, and long service life. Currently, Viton has excellent heat resistance (up to 450° F) and abrasion resistance and is the material of choice for most valve stem seals. If you have any valve stem seal needs, please contact us.