Generally, an oil seal is made up of an outer circular metal part and a bonded inner flexible material (often nitrile rubber) that does the actual sealing.
The car valve cover gasket is a crucial component in an automobile's engine. It acts as a seal between the valve cover and the engine block, preventing oil leaks and ensuring that the engine runs smoothly. A damaged or worn-out valve cover gasket can lead to several issues, including reduced engine performance, increased oil consumption, and ultimately, engine failure. 2. Cartridge-Type Metal-to-Oil Seal As the name suggests, this type of seal is housed in a cartridge that can be easily installed and replaced. Cartridge-type seals are designed for applications where frequent maintenance is required or where the shaft diameter is too large for face-type seals.