6.1.2. Dropping pressure in fuel system of the petrol engine

Before getting to work, get acquainted with the precautionary measures given in the Section of the Security measure and the rule of respect for purity during the work with fuel system

After implementation of the procedure described below you only remove excessive pressure from fuel system. In pipelines there will be a gasoline. Before disconnecting any fuel hose, take all necessary precautionary measures.

The fuel system considered in this Chapter consists of the fuel tank located in it the fuel pump with the sensor of a reserve of fuel, the fuel filter, nozzles, the regulator of pressure and various hoses and tubes. In all these knots in operating time of the engine (and also at the included ignition) fuel is under pressure.

After switching off of ignition pressure in system remains still quite long time. Before a detachment of any of the components mentioned above pressure needs to be dumped.

The simplest way of dumping of pressure is following. Take a safety lock of the fuel pump and start the engine. If the engine is not started, turn it a starter within several seconds and if it is started, wait for its spontaneous stop. Completely to dump pressure, turn the engine crankshaft a starter on couple of turns. Switch off ignition and return into place a pump safety lock.

The valve of dumping of pressure located works at the fuel distributive highway by the principle of the simple nipple. Place rags around the valve, remove a cap and press on the nipple. After completion of work do not forget to return a cap into place.

Keep in mind that if pressure is dumped (or fuel is removed from system), start of the engine will take bigger, than usually, time. You should turn the engine crankshaft a starter at least several seconds during which pressure in system will be restored, and fuel will fill all pipelines.