From this kind of standard immersion testing, one would expect that bisphenol-cured VDF/HFP/TFE fluoroelastomers would not give good service life as oil seals. Similar tests with other elastomers, such as HNBR, silicone, and acrylic rubbers, show less loss of elongation. However, it is found that, in actual service, FKM shaft seals6 have much longer service life than seals of the other elastomers. In a Japanese study of FKM lip seals, rear crankshaft seals from high-mileage automobiles (70,000–280,000 mi ie, 110,000–450,000 km) were collected and examined. No serious oil leakage was found when the seals were removed from the engines. Some deposits were found around the seal lip and on the garter spring holding the lip against the shaft. No surface cracks were found on the seal lip, and only minor crazing on the crankcase side of the flexure portion of the seal in some samples. The seal compositions were not noted, but most were probably VDF/HFP/TFE elastomers with 68–69% fluorine content.
- The valve cover gasket, often referred to as the VCG or head gasket, is a critical component in any internal combustion engine. For those with a 5.7-liter Hemi engine, choosing the right gasket is essential for maintaining optimal performance and preventing costly repairs. In this comprehensive guide, we'll delve into the importance of the valve cover gasket, its specifications, and how to identify if you need a replacement.
- In conclusion, the spark plug coil plays a critical role in the ignition system of a vehicle. It is responsible for generating the high voltage needed to create a spark in the spark plugs, which ignites the air-fuel mixture in the engine's cylinders. Regular maintenance and inspection of the spark plug coil is essential to ensure the engine runs smoothly and efficiently. By being aware of the signs of a faulty spark plug coil and replacing it as needed, you can help maintain the performance and longevity of your vehicle.
- One of the key functions of the oil seal 12 22 5 is to create a barrier between different components of the machinery, such as the engine and transmission. By effectively sealing the gap between these parts, the oil seal prevents oil from leaking out and contaminants from entering, thus prolonging the lifespan of the equipment.

Heat resistance
EPDM oil seals are less common. They are used in solvent, hot water and steam applications, EPDM resists low temperatures down to -50 °C and UV radiation well. Some types of EPDM are also suitable for higher temperatures up to +150 °C. EPDM oil seals are usually available upon request.
AVAILABLE OIL SEAL STYLES & MATERIALS
The major cause of extrusion and nibbling is stress caused by high pressure. This is commonly noticed when the oil seal has a chipped or nibbled look. In fact, in some cases, the surface of the seal tends to peel on its own, which makes it have a shaved look. What the stress does is that it increases the clearance gap between the mating edges, which causes the seal to get entrapped, and then leads to severe physical damage.
Rotary Wheel Of Auto Parts
By far, nitrile is the most popularly used, but buyers who need seals for applications involving high-speed shaft rotation increased interest. Viton is another alternative for silicone and poly-acrylic because it’s more resistant to harmful chemicals and abrasion and works better in higher temperatures.
BENEFITS OF OIL SEALS
Among the most common causes of oil seal failure are:
5. Apply Even Pressure
How to Choose the Right Oil Seal


Oil Seal Materials