Niagara Gazette — Fuel Filter/Water Separator Maintenance — Diesels depend on the fuel itself for internal cylinder and injection pump lubrication, so it is critical for water to be filtered out as well as dirt. The function of water and other contaminant filtration is typically combined in a single filter on a diesel. The filter will have a bowl or other reservoir at its bottom, since water is heavier than diesel fuel and will sink to the bottom for draining. Diesel fuel filters have a valve at the bottom where water can be drained off. This is a simple matter of opening the valve until all the water has drained away, leaving only diesel fuel visible in the inspection bowl or in the stream released from the filter. Many cars are equipped with sensors and electronic valves that perform this function automatically, so the driver does not have to think about it. Check your owner’s manual for information on this.
Cooling systems — Engine coolant battles rust & scale formation,
Acid buildup, foaming, silicate drop out and debris while it works to transfer heat and maintain engine operating conditions for optimal fuel economy. Regular coolant flushing and replacement is necessary to ensure optimum performance and longevity. Your carmaker will outline coolant drain intervals in the maintenance schedule. On some diesel engines, the cooling system uses a coolant filter to control the acidity (ph value) of the coolant. This filter ensures that the engine block does not build up rust & scale inside. Additionally, the filter releases anti-foaming compound and acid inhibitors offering added cooling system protection. This filter, like other filters needs regular replacement. Check owner’s manual for replacement intervals. Finally, there are some great coolant additives on the market that provide additional protection by maintaining nitrate levels, which aid in keeping rust inhibitors strong.