When selecting a natural rubber gasket for your specific application, there are several key factors to consider. The first is the hardness of the gasket, which is typically measured on the Shore A scale. A softer gasket (lower Shore A hardness) is more flexible and better suited for applications where the sealing surface is uneven, while a harder gasket (higher Shore A hardness) provides better resistance to compression and extrusion.
Proper installation and maintenance of shaft oil seals are essential to ensure their effectiveness. The seal should be inspected regularly for signs of wear and tear, such as cracks or damage to the lip. If any issues are detected, the seal should be replaced immediately to prevent leaks and damage to the system. Regular maintenance and timely replacement of diesel glow plugs are essential. Signs of worn-out glow plugs include difficulty starting the engine, rough idling, black smoke emissions, and decreased power output. It's advisable to follow the manufacturer's recommended service intervals or replace them immediately if any issues arise.
If you’re committed to preserving your vehicle for the long run, stick to regularly scheduled preventative maintenance services, especially oil changes with high mileage oil.
The primary function of the C15 valve cover gasket is to prevent oil leaks from the engine. When the engine is running, oil is constantly being pumped throughout the system to lubricate the moving parts. The gasket acts as a barrier, ensuring that the oil stays within the engine and does not leak out. Without a properly functioning gasket, oil can leak onto the engine's hot surfaces, causing it to overheat and potentially leading to serious engine damage.The depth of the bonded seal can be less and the space between the bore and the outside diameter can be changed for ease of fitting. The bonding of rubber to metal is an important factor to be considered in the manufacture of such seals and should be considered carefully, since failure of the bond will cause the seal to fail. The metal case of the oil seal is usually made from mild steel of deep drawing quality which enables blanking, punching, stamping of the steel to the required dimensions.

A more comprehensive study of aeration by Dinzburg8 showed that even a minimal level of aeration of an aggressive European SF oil led to protection of a VDF/HFP/TFE compound, but to severe deterioration of an HNBR compound. He notes that aeration increases the severity of aging in oil for silicone and acrylic elastomers, while decreasing the severity for FKM elastomers.