Diesel fuel filter (Renault 19)

The diesel engine fuel filter is installed on the front inner surface of the right wing in the engine compartment. When changing the filter, the filter housing must be disassembled. To remove water from the filter, unscrew the bolt (shown by a small arrow). Before you unscrew this bolt, put a hose on it so that the removed water can be collected in a container.

By pressing the diaphragm pump (shown by a large arrow), You will be able to fill the pump with fuel and simultaneously remove air from the filter housing, thereby preventing the high-pressure fuel pump (HPFP) from running dry when starting the engine after changing the filter.



Distribution fuel injection pump (high pressure fuel pump) diesel engines are very susceptible to fuel contamination (dirt particles clog the holes in the hollow screw connecting to the fuel line, and the pump heats up). It is especially sensitive to the presence of water in the fuel.

Water in fuel mainly comes from condensation in the car's tank or from an underground cistern at a petrol station. Liquid and solid impurities must be filtered out before the fuel reaches the high-pressure fuel pump (HPFP). This happens in the fuel filter. The filter element traps dirt particles so that they do not get into the pump. At the bottom of the filter, water separates from the fuel because it is heavier.

[Article reprinted from the website: renaultbook.ru]