- An oil seal is a small, circular component made of rubber or metal that is placed between moving engine parts to prevent oil from leaking out. It creates a tight seal around the engine shafts, ensuring that oil stays where it should be - lubricating the engine components. Without a properly functioning oil seal, oil can leak out of the engine, causing damage to the internal components and leading to costly repairs.
- The material of the valve cover gasket varies, with, cork, and multi-layer steel being common choices. Each material has its advantages and disadvantages. Rubber gaskets are flexible and durable, while cork gaskets provide a good seal but may degrade over time. Multi-layer steel gaskets, on the other hand, offer superior heat resistance and durability, making them ideal for high-performance engines.
- When selecting a valve cover gasket for your 5.7 Hemi engine, it's important to choose one that meets the specific requirements of your vehicle. The gasket should be made from a durable material that can withstand the high temperatures and pressures of your engine. It should also be designed to fit perfectly between the valve cover and the engine block, providing a leak-proof seal.
VMQ (silicone)
- In the world of automotive engineering, the spark plug plays a crucial role in the combustion process that powers our vehicles. A7TC spark plugs are known for their high-performance capabilities and are designed to enhance engine performance, reduce emissions, and improve fuel efficiency. This guide will provide you with an in-depth understanding of A7TC spark plugs and how they can benefit your engine.
- In conclusion, the 20 30 7% oil seal represents a sophisticated engineering solution that combines the best properties of rubber, fabric, and steel. Its unique composition ensures a robust seal, capable of withstanding harsh operating conditions while preserving the integrity of the lubrication system. As technology continues to advance, the importance of such specialized components in ensuring the smooth and efficient functioning of modern machinery cannot be overstated.
Construction of an Oil Seal
Size #: Corresponds to sizes found on our Oil Seal Size Chart. The interactive chart will display matching sizes based on the dimensions input for Shaft, Bore, and Width. The Oil Seal Size # is hyperlinked to our online store, which will display all sizes matching the selection.
Oil seals come in various shapes to fit the machine or substance for sealing.
For this reason, when designing a machine, it is important to select the oil seal that is right for that machine.
Next time, we will explain the key points to consider when selecting your oil seal.



Most standard oil seals have to comply with the DIN 3760 and ISO 6194 standards. Different standard types of oil seals are available that comply with these requirements.
Fit the gasket to the cover, making sure any screw holes line up. If the gasket has tongues, fit them into their cutouts.
Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.
Before you start installing oil seals, you need to choose the right size and type of oil seal for your application. Oil seals come in a variety of sizes and materials, so it's important to choose the right one for your needs. Consider factors such as temperature, pressure, and fluid compatibility when choosing an oil seal.