- One of the main reasons for oil valve cover gasket failure is wear and tear due to the high temperatures and pressures inside the engine. Over time, the gasket can become brittle and cracked, allowing oil to seep out. This can lead to a loss of oil, which can in turn lead to engine damage and poor performance.
Single Metal case Choosing high-quality oil seals for your roller bearings, precision bearings, and more is an important decision, so at Emerson Bearing Company, we do more than manufacture oil seals. We draw from over 50 years of expertise in the area of bearings and bearing-related components so that our team can help you choose the right oil seals for your exact needs, regardless of the nature and complexity of your application. Should we not have a particular part in stock in our vast inventory, we also utilize a worldwide sourcing network to deliver on premium products. The Emerson team strives to provide a one-stop experience for our customers, from sourcing and budgeting to assistance in oil seal selection and timely delivery with same-day shipping options.


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By first finding out the dimensions of the inner and outer diameters and the height of the bore, you have all the data for the correct size of the oil seal. Of course, the oil seal must also be able to withstand the pressure, temperature and medium it is exposed to within the seal during the manufacturing process. You can read more about this in our oil seal selection guide.
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.
If you find a gap, measure it by sliding a feeler gauge under the ruler.

motor oil seal. Signs that a motor oil seal may be failing include oil leaks around the engine, low oil levels, and unusual engine noises.
For more detailed information, please see the following:
Early engines used O-rings (also called packing rings or toric joints) as seals (first patented in 1896). These are just mechanical gaskets in the shape of a torus (a circular ring--like a lifesaver), seated in a groove and compressed during assembly between two or more parts. It creates a seal at the interface. However, O-rings require a fluid film to lubricate them. They have limited usefulness in vacuum application and at extremes of temperature. The modern oil seal represents a significant improvement over the simple O-ring because it effectively seals in lubrication and prevents contamination from outside under a wide range of pressures and temperatures.
(burr, corrosion, etc.), which will directly affect the service life of the oil seal.
PTFE, which is used in the well-known brand Teflon®, is less commonly used, but it is the preferred material for specific rotating seals in the chemical, food and pharmaceutical industries. This material is notable for having a very low frictional resistance and the best chemical resistance. It can also withstand a very wide range of temperatures in these types of seals; -80 ˚C to 200 ˚C. The shafts on which oil seals with PTFE lips are used require a harder and finer finish. Something like an axle sleeve can also be used to meet this requirement.
In addition to the installation procedure, our specialists and suppliers would also like to draw your attention to some cases that occur around oil seals.
Most oil seals consist of some basic elements that configure their structure, such as the sealing element, the metal case, and the spring: