Furthermore, natural rubber gaskets are highly durable and long-lasting, making them ideal for applications that require frequent assembly and disassembly. Unlike synthetic rubber gaskets, natural rubber gaskets are less prone to degradation from exposure to heat, ozone, and UV radiation, ensuring a longer service life and reduced maintenance costs.
Rotary Wheel Of Auto Parts
3) Seal numbering system
As type B with dust lip
The edge of the metal is finely ground after seal manufacture in a centerless grinder to enable an interference fit in the oil seal housing. A slight chamfer on the outer diameter (OD) of the seal is desirable for easy assembly. The sealing lip is prepared by buffing, grinding or cutting away the rubber flash which occurs at the sealing edge. A fine sealing edge creates sufficient pressure on the shaft to minimise spring load, leading to lower friction whilst maintaining effective seal performance. The garter spring plays an important role in the efficiency of the oil seal. If its tension is too high, heat will be generated between the sealing lip and the shaft, and result in rapid wear of the lip. If too low, the spring will be ineffective and the sealing lip will be worn away leading to leakage of the fluid.
Take off the gasket from the cover flange or cylinder head , noting how it is attached. Some gaskets have tongues that fit cutouts in the flange; others are stuck to the flange with sealant ; some just fit into the flange groove .

The maximum allowable shaft speed is a function of the shaft finish, runout, housing bore and shaft concentricity, type of fluid being sealed and the type of oil seal material.
Put the jack and wooden spacer under the sump and raise the engine just enough to free the supports.