An oil seal, also known as crankshaft retainer, is a small device, but essential to ensure the proper engine operation. It plays a key role in all moving parts of an engine, acting as a physical barrier. This mechanical seal fulfils the dual purpose of sealing a rotary shaft to maintain the necessary lubrication (avoiding leaks) and preventing other foreign matter from contaminating shafts and bearings in the rotary shaft equipment.
Other important factors are ensuring the hardness and roughness of the shaft are correct. A shaft hardness of HRC 45 is recommended for a rubber sealing lip, with a roughness of Ra 0.4-0.8. A higher shaft hardness of HRC 60 and shaft roughness of Ra 0.1-0.4 is recommended for a PTFE lip.
What materials are available?
Runout must be kept to a minimum. Movement of the center of rotation is usually caused by bearing wobble or shaft whip. When coupled with misalignment, this problem is compounded. Contrary to popular belief and common practice, the installation of flexible couplings cannot correct or compensate for misalignment.
Sealing process
Many – too numerous to list, covering a vast range of designs, sizes, and materials suitable for a never-ending range of applications. Some designs conform to International Standards such as BS1399 and DIN 3760 for metric sizes and seal types, but the majority have been manufactured to suit particular applications – hence the enormous selection available. This blog is intended to assist in this selection and will consider seal type, materials, and sizes.


Smear gasket sealant on the mating faces of the pump and the engine. Refit the pump and gasket or gaskets and tighten the fixings.
Durability is another important factor to consider when choosing a spark plug, and the Spark Plug 794 00082 excels in this area as well. With its robust construction and high-quality materials, this spark plug is designed to withstand the rigors of daily driving and maintain its performance over the long term. This means that you can rely on this spark plug to provide consistent ignition performance, even in the most demanding driving conditions.

Automotive gaskets encompass a wide range of sealing components used in vehicles, including exhaust gaskets, intake manifold gaskets, and more. These gaskets are available in various materials, such as rubber, silicone, and metal, each offering specific properties suited for different applications. The selection of high-quality automotive gaskets is crucial for ensuring reliable sealing solutions that contribute to the overall performance and safety of the vehicle.
In this an auxiliary lip is provided along with the regular sealing lip. The additional dust lip protects the main sealing lip against dust and other fine solid contaminants and therefore this type is recommended for use in polluted environments. To achieve a long lifetime a suitable lubricant between the two sealing lips should be applied.
Loosen the securing-clamp bolt at the base of the distributor, then carefully withdraw the distributor.