Another advantage of GRP car bodies is their design flexibility
Operating temperatures for engine oil seals (see Fig. 14.11 and cross-section of lip seal with garter spring in Fig. 14.22) vary widely, depending on engine design and location within the engine. Typically, the rear crankshaft seal is subjected to much higher temperatures than the front seal. Oil sump temperatures vary considerably, depending on provisions for oil cooling. This allows use of hydrogenated nitrile (HNBR), silicone, or acrylic elastomers for some seals in relatively low-temperature environments (120–140°C or 250–284°F). Standard fluoroelastomers (FKM), bisphenol-cured VDF/HFP/TFE terpolymers with 68–69% fluorine content, perform well in oil service up to about 160°C (320°F). More resistant fluoroelastomers are necessary for reliable long-term performance in more severe environments.
Pick the proper seal for your bearing with the NBC bearing.
Oil Seal Installation

u shaped rubber gasket. The U shape of the gasket creates a compression seal when it is installed, ensuring that no air or liquid can escape from the sealed area. This tight seal helps to prevent leaks, reduce energy loss, and protect sensitive equipment from environmental contaminants.
9 Factors for Selecting Oil Seals
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Slowly raise the engine about 11 in. (38 mm) and insert wedges between the mounting rubbers and pads .