Water in Fuel
The greatest enemy of diesel fuel injection components is water. Once the water enters the system, it will rapidly wear and oxidize steel components and lead to:
- Rusting and corrosion of components
- Governor/metering component failure
- sticky metering components (both pump and nozzle)
- Injection component wear and seizure.
Water contamination can exists in diesel fuel in three forms:
- Emulsified water, where the water is suspended in the fuel like oil and vinegar.
- Free water, where the water is separated from the fuel and usually found on the bottom of the fuel/storage tanks.
- Dissolved water, where the water has been chemically dissolved in the fuel, like sugar in liquid. *The warmer the fuel, the more water will be dissolved, but as temperatures drop, the water will come out of the solution in the form of free water.
Free or emulsified water must be removed from the fuel to prevent corrosion and damage to the fuel system. The best way to do this is with a Stanadyne Fuel Manager filter incorporating a water separator. Be wary of certain additives which claim to “remove water.” In fact, they dissolve the water, which eventually will pass through the filter and attack the injection components. Stanadyne additives demulsify the water, pulling it out of solution so the filter/water separator can more effectively remove it.