The internals of a well operating machine consist of a myriad of metal parts moving past each other under the tightest tolerances. Foreign particles are an absolute nightmare to these parts. If the inside of an engine were to get contaminated, the debris would cause catastrophic damage when trapped in these tight tolerances. Through metal cases, seals, and gaskets, all of the insides of the engine are protected from the damaging elements of the environment in which it is used. Since air from the surrounding environment is necessary for the combustion process, the air filter acts as the ‘seal’ of the air intake. It has the important job of preventing particles contained in the air from entering the engine, even the finest dust particles that could potentially cause engine damage. What makes its job more difficult is it must do so without restricting airflow and affecting the engine performance.
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