Many oil seals are capable of resisting contact with grease, fuel, water, and other elements. Knowing what type of fluid the seal will interact with will help you choose the right oil seal that can withstand those types of fluids.
- Spring Back: The rubber-covered OD of the seal may have elastic memory, causing it to retract from the installation point after being pressed in. Ensuring the bore is clean and provides sufficient friction helps prevent spring back.
2. Oil seal structure and functions
There are different types of spark plugs available, including copper, platinum, and iridium. Each type has its own advantages and disadvantages, so it is important to choose the right spark plug for your vehicle based on its specific needs.
ignition spark plug

The price of oil seals can vary based on several factors, including the type of seal, material quality, size, and market demand. High-quality oil seals designed for specific industrial or automotive applications may command a higher price due to their precision engineering, durability, and compatibility with various machinery and equipment. When considering the price of oil seals, it's important to prioritize quality and reliability to ensure optimal performance and longevity in the intended application.



In conclusion, rubber valve cover gaskets and valve cover gasket sets are essential components in automotive engines, contributing to the efficiency, performance, and reliability of the engine. Understanding the significance of these gaskets and their proper maintenance and replacement is crucial for optimizing the performance and longevity of the engine.
Different Types of Oil Seals
Motor oils typically include a few additives which can make up between 5% and 30% of the oil. These additives help enhance the performance of the oil. Motor oils can include the following additives:
Figure 5: JTEKT seal numbering system
Table 6: Codes and numbers used in seal numbers