Gasket

A gasket is any thin compressible component which is positioned
between two hard surfaces to create a perfect seal between
the two. Gaskets can be found all over vehicles from the engine
to the transmission and radiator. Most modern gaskets are
formed from rubber however cork is also commonly used on older
vehicles. Sometimes if a gasket has been in place for many
years the two components it is between can become stuck together
and a pry bar
may be required to separate the two. When using a pry bar
care should be taken not to damage or scratch the two surfaces
as sealing them during reassembly may be difficult. It is
good practice to use new gaskets when reassembling components
after repair as they can often become damaged during separation.
Faulty gaskets are one of the most common causes of oil, transmission
fluid, and coolant leaks, and although the gaskets themselves
are relatively inexpensive sometimes their replacement can
be time consuming and labor intensive.
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