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- Cylinder head gaskets are a vital component of a vehicle's engine, playing a crucial role in maintaining the integrity of the combustion chamber. These gaskets are designed to seal the gap between the engine block and cylinder head, preventing any fluids or gases from escaping or leaking into the combustion chamber.

How are they used?
There is a British Standard laid down for the control of synthetic rubbers. BS 3574 (1989) helps to determine shelf life – for instance, Nitrile (NBR) and Polyacrylic (ACM) are Group ‘B’ rubbers and have a 7-year life, whilst Silicone (VMQ) and Fluoroelastomers (Viton®) are Group ‘C’ rubbers and have a 10-year shelf life. PTFE and Leather do not come into this category but like the others should be kept in the original packing for as long as possible away from direct light, dust, and humidity. Ozone, which can also be produced by battery-driven forklift trucks has a very bad effect on synthetic rubbers. Finally, protect the sealing lip – DO NOT hang the seals on nails, wire etc.
7. Repeat the Process
Shaft and Bore Tolerances
Cassette seals are designed to maximise grease or oil retention and protection against liquid or solid contaminants. These seals are provided with their own bushings in which dirt is kept out and oil/grease kept in by a multi-lip seal.
Figure 2: Typically shaped oil seal and component nomenclature



m20 valve cover gasket.
Oil seals with outer metal cases may include finishes or treatments applied to the outer edge to aid in rust protection, identification, and sealing of scratches or imperfections in the housing bore. Common finishes applied to the outside edge of metal O.D. oil seals include plain (a bonding agent of usually a yellowish-green color), a color-painted edge, and a grinded-polished edge.
Material Code ISO 1629
Oil seals, also known as grease seals or shaft seals, are essential components in many machines and systems. They play a crucial role in preventing the leakage of oil and other lubricants, ensuring the smooth and efficient operation of various mechanical parts.
b) The area where the oil seal is seated is to be plunge ground in order to prevent wear grooves that normally tend to wear out the lip of the oil seal at a faster rate.
Where to buy oil seals in the UK
We are an honest oil seal supplier.We have very good expertise, experienced technicians, new good equipment, strict inspection procedures, durability and performance seal testing, PPAP level IIl submission. Strict process control, international standard high-quality products and affordable prices. The strength factory has more than 150 workers, strong delivery capacity, we provide you with the best after-sales service.
Viton Oil Seals - A synthetic rubber and fluoropolymer elastomer, Viton is used to make oil seals that provide resistance in both high temperature, up to 250°C and low compression set components. They also offer a high resistance to chemicals and abrasions, so they can be used in elements that regularly interact with petroleum and solvents.
a) The shaft on which the oil seal is to be mounted should be ground with the surface finish or surface roughness between 0.2 to 0.8 Microns. It is best for the shaft to be hardened atleast to 40 – 45 HRc in order to prevent groove formation on the shaft due to the pressure exerted by the spring.