Your Fuel Filter...

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What the Automotive Fuel Filter Does...
Fuel filters are essential in helping to protect fuel system components from contaminants that may be in the fuel. These contaminants can plug fuel injectors or carburetors, causing engine malfunction and deterioration. Dirt, rust, scale and water are the major impurities present in fuel. These impurities can originate from dirty and rusty service station storage tanks and, as the vehicle ages, from corrosion within the fuel system components. All of the fuel that enters the engine must first pass through the fuel filter.

Diesel Fuel Filters...
Fine particles, free water and emulsified water must be removed from diesel fuel before it passes through the fuel injection system. Fuel from the fuel tank is routed through the filter where contaminants are removed. If the filter is a fuel / water separator, the fine particles remain trapped in the filter media while the water droplets come together and fall to the bottom of the filter. Water separator filters are equipped with a drain at the bottom of the filter to drain this water from the filter. Spin-on fuel filters feature built-in gaskets. Some spin-on filters, fuel / water separators, have a drain plug designed to prevent accidental interchange of primary and secondary elements when used with dual filter systems. All fuel filters are designed to withstand minimum internal differential pressures of 75 psi. Spin-on filters reduce the possibility of misinstalled cover gaskets, long life and the possibility of extended service intervals.