How to Maintain Diesel Generator Lubrication Much like another of our major internal organs, the oil pan functions in a similar fashion to the liver. It is the prime filter of impurities in our system. Whatever combustion impurities exist inside the walls of the engine, none will avoid detection in the oil pan. An inspection of the oil during a routine change will inform the maintenance technician whether that combustion is complete or suffering from serious problems. A diesel engine is designed to keep the different internal functions separated from one another: Combustion from lubrication and cooling. Metal rings adorn the perimeter of the piston head to prevent oil and diesel from mixing. Diesel fuel that escapes combustion will stick to the shaft and eventually migrate south into the oil pan. So will another common impurity prevalent in diesel: water. It too will resist combustion and escape into the oil pan. But fuel is not the only source of water contained...
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