The small little oil seal has an outsized role in power transmission.
- Leather Oil Seals – They are also known as Type L Oil Seals and are used most with parts that are subject to dirt and poor lubrication. They are pre-lubricated and can absorb fluids and can provide sealing properties in conditions that synthetic rubber is unable to.


Proper installation and maintenance of the valve cover gasket are essential to ensure its effectiveness and longevity. Regular inspection and replacement of the gasket when necessary can help prevent oil leaks and maintain the integrity of the engine. Adhering to recommended service intervals and using high-quality replacement components are essential for optimizing the performance and longevity of the engine's valve cover gasket.
Oil Seal Manufacturing: Processes and Considerations
First, wash your hands before handling the oil seal. This is because dirt on the sealing surface or oil in fingerprints can compromise the integrity of the seal, while small particles can cause wear and tear, damaging the sealing surface and leading to leaks.
Secondly, do not unpack the seal unless you are ready to install it. After opening, the seal face must be cleaned before installing it on the equipment to prevent contamination.
Finally, ensure that your equipment is clean. This is because dirty equipment can affect the effectiveness of the oil seal.