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Overview
Essential details
Size : 03818025
Brand Name : SNAK
Product Name : 03818025 Valve Stem Seal
Certificate ：ISO9001/TS16949
OEM : 24405819
Pressure tolerance : 0-1000 fpm
Features : Excellent resistance to oils/fuels and high temperatur
Place of Origin : Hebei, China
Model Number : 03818025
Color : Customers Required
Benefits : Long term emissions control,Long service life
Material type : NBR
Service : ODM OEM
Standard or Nonstandard : Standanrd
Packaging & delivery
Supply Ability : 10000000 Piece/Pieces per Day
Port : China port
Package Type : cartons packing Delivery Detail Within 15 days
Lead time :
SNAK Factory ISO Certificated Valve Stem Seal For Citroen Peugeot 03818025 Oil Seal
*Valve stem seal
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.
Different than other seals in the engine, valve stem seals play an important role in lubrication. Valve stem seals allow a controlled amount of oil to lubricate the valve stem as it moves in the valve guide. The amount of oil that passes by the valve stem seal must be precisely controlled. Too little oil causes stem and guide wear; too much oil causes carbon buildup leading to valve seat damage, decrease in volumetric efficiency, increased emissions, catalytic converter degradation and excessive oil consumption.
*Deflector seals move with valve stem
Also called umbrella seals . these seals deflect oil away from the valve stem .They are secured to the valve stem andmove with the valve to shield the valveguide from excess oil
*Positive seals are fixed to thevalve guide boss
Designed to attach to the valve guide boss
and function as squeegees , these seals wipe and meter oll on the stem as they pass through the seals. .
*Material Choice
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.
When synthetic rubber is used, there are three basic types: nitrile, polyacrylate, and Viton. The biggest difference between the three types of synthetic rubber seals is their heat resistance. A synthetic rubber seal with insufficient heat resistance will harden and crack prematurely. This can lead to seal degradation, with pieces of the seal breaking away and clogging the oiling system and oil pickup screen, causing engine damage from loss of lubrication. Because of this, many valve stem seals for late
model cars are made of Viton and NBR.
Tens of thousands of specifications are available from stock. For more models and specifications,
please consult customer service
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Tel: +86-18733900528
Add: Tiankou Town，Beiding Village， Renze District, Xingtai City, Hebei Province