- The m20 valve cover gasket is a crucial component in the engine of many BMW vehicles. This gasket is responsible for creating a tight seal between the valve cover and the engine block, preventing oil leaks and ensuring proper lubrication of the engine components.

oil seal 25 35 7.
Why Is Bearing A Seal Important?


Although it does have a higher tensile strength and longer wear times than other materials, it is recommended to be used in dry-running applications sparingly or intermittently.


The outer part of an oil seal is made of metal or rubber, depending on the intended application. Metal-cased seals are a cost-effective option used when the housing bore is made of the same material, allowing for equal expansion and contraction of the materials during use. Rubber-cased oil seals provide a tight fit and are commonly used when metal-cased seals have the potential to fail. They are corrosion-resistant and capable of withstanding extreme temperatures and pressures.
■Dispersants: This is your oil’s magic ingredient. It gives your oil the ability to absorb and hold solid contaminants so that they don’t damage the engine.
Table 14.1. Fluoroelastomers Used in Oil Aging5
Iridium spark plugs are becoming increasingly popular among car owners due to their superior performance and longevity compared to traditional copper spark plugs. These advanced spark plugs are made with a small center electrode made of iridium, a rare metal known for its strength and high melting point. This allows the spark plug to create a more consistent and powerful spark, resulting in better ignition of the air-fuel mixture in the engine.
Various materials with unique properties are utilised in the construction of rotary shaft seals, allowing manufacturers to tailor the sealing solution to specific industry requirements and ensure optimal performance.