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Investing in quality seals will benefit you and your machine in the long run. The cost of replacing oil seals will be higher as cheaper alternatives are constantly being purchased. Not to mention, the efficiency and quality of low-cost oil seals may not be reliable.
Table 5: Major rubber materials and their operational temperature ranges
Case study 1: Volkswagen

Rubber type

skeleton oil sealing. These foreign particles can cause significant damage to machinery if they enter the system, so it is essential to have a reliable sealing solution in place.
Remove the pump fixing nuts or bolts. Pull the pump and gasket or gaskets off the engine.