Sediment - chronic disease of the engine

Machine death, weak operation, difficulty starting up, consuming a lot of fuel are problems caused by soot sticking in the engine. Washing this residue will help your engine work more efficiently.

The two areas in the engine often have residues of fuel nozzles and behind valves. They are generated because the fuel does not burn completely. If the injector becomes sticky, it will affect the feeding process, reduce dispersion, reduce the amount of fuel that causes the engine to be weak and often jerky.

Meanwhile, the residue behind the valve will reduce the amount of air entering the combustion chamber, creating a rich mixture and increasing fuel consumption. If the residue is on the exhaust valve, the exhaust gas after the combustion process does not escape, affecting the compression ratio and engine life.

Engine on Honda NSX.(Photo: Honda)

Scaling is a problem for all engines, however, there are heavier ones. The cause is almost not due to the engine itself but depends on fuel, oil and how to drive.

With multi-point gasoline injectors, the injector is located below the loader with the role of fueling the engine. Fuel sprayed from the nozzle into the cylinder in the form of a fog to evaporate quickly. When the engine is turned off, the heat evaporates the fuel deposited on the needle and leaves a heavy residue, including substances with large molecular weight. These substances after the motor process will turn into ceramic residues.

When there is residue, the injector will work inefficiently because the fuel does not form a mist but becomes droplets so the combustion process is interrupted, the engine works unevenly and consumes a lot of fuel. There are 3 methods to help vehicle owners avoid the danger.

First , you should take a long trip. When using the car for a long time, a large amount of fuel is sprayed through the needle, thereby cleaning them.

Second , you should use good quality gasoline. In North America, nearly all gasoline manufacturers add additives to clean up injectors. However, ingredients as well as types are kept confidential.

The third way is to use cleaning agents from a third party. In this case, it should be very careful because the quality of these products cannot be certain. It is best to choose which company is certified by the gasoline manufacturer.

With the residue behind the valve, the removal is much more difficult. Even when removing, technicians are difficult to clean them. These debris affect the incoming air flow and sometimes they are large enough to seal, making the engine look weak.

Some firms such as BMW have a special way to remove the residue behind the valve. First, the loader is removed and the crankshaft is put in position so that the intake valve closes. Afterwards, a fitting was attached to the cylinder head and sprayed with walnut oil into the back of the valve. Walnut oil has the effect of cleaning and burning completely when restarting the engine.

Finally, to keep the engine clean, it is recommended to replace the oil and oil filter regularly to reduce the risk of these situations.

Nguyen Nghia