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Oil seals are rubber and metal composite items. They are generally
mounted at the end of shafts. They are used to keep fluids, such as
oil, transmission fluid, and power steering fluid inside the object
they are sealing. These seals flex to hold a tight fit around the
shaft that comes out of the housing, and don't allow any fluid to
pass. Oil seals are common points of leakage and can usually be
replaced fairly inexpensively. However, the placement of some seals
make them very difficult to access, which makes for a hefty labor
charge!
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