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.
- SHOP FOR OIL SEALS
- 1. Drain the engine oil and coolant.
- Testing a spark plug involves several steps. Firstly, it's essential to disconnect the spark plug wire from the plug and ensure the engine is cool. Using a spark plug socket and ratchet, remove the plug for inspection. The color and condition of the insulator tip can provide valuable insights. A light brown or gray color indicates proper combustion, while white may suggest overheating, and black could mean rich fuel mixture.
- Replacing the valve cover gasket is a relatively straightforward process, but it is essential to do so promptly if you notice any signs of wear or damage. Common symptoms of a faulty valve cover gasket include oil leaks around the edges of the valve cover, a burning oil smell, or visible oil on the engine block.
Seals are designed to create a tight seal around the shaft by utilising a combination of lip geometry, surface tension, and lubrication. When the shaft rotates, the lip of the oil seal comes into contact with the shaft surface, creating a frictional force that generates heat. This heat helps to soften and conform the elastomeric material of the oil seal to the shape of the shaft, ensuring an effective sealing action.
Spring Seals
The range of uses of peroxydically cross-linked EPDM includes in hot water and steam seals. EPDM is also very resistant to ageing and ozone. Compared with the usual types of synthesis natural rubber it has good resistance to cold temperatures. EPDM is not resistant to aliphatic or aromatic hydrocarbons or mineral oil products. Resistance to chemicals, and also to oxidising agents, is very good. Temperature range from -50 °C to +140 °C depending on type.
Almost every lip seal is constructed to have a flexible inner part that creates a dynamic seal on the moving shaft, as well as a hard outer casing that statically matches the machine-end cover. The flexible part is made from different grades of rubber, while the hard part is made of light-gauge metal or strong plastic.
Seals are classified by O.D. wall material, lip type, and whether they have a spring or not.
Major oil seals are specified in ISO 6194-1 and JIS B 2402-1.
Table 2 shows the common types of oil seals, while Table 3 shows the features of each type of oil seal.
Table 4 lists the JTEKT oil seal type codes and corresponding ISO and JIS standards.
Materials used
One of the key advantages of the 30-50-10 oil seal is its ability to provide a tight seal without compromising on flexibility. This means that the oil seal can effectively prevent oil leaks while allowing for smooth movement of the machinery or equipment it is installed in.
oil seal 30 50 10


Metal O.D. wall type (with a reinforcing inner metal case) Protects the main lip.
When selecting spark plug wires and new spark plugs, it is essential to prioritize quality, compatibility, and performance specifications. High-quality spark plug wires should be designed to withstand high voltage and heat, ensuring reliable transmission of electrical current to the spark plugs. New spark plugs should be selected based on the specific requirements of the vehicle, including heat range, electrode design, and material composition, to ensure optimal ignition and engine performance.


In addition to these standardised types, the following special types are also available:
Based on the application of the oil seal, the outer skin layer tends to differ. Here are some types of the materials used for the outer skin of the oil seal.