How to replace the fuel filter

Fuel filter is to remove the iron oxide, dust and other solid debris in the fuel, to prevent fuel system blockage, reduce mechanical wear and tear, to ensure stable operation of the engine, improve reliability. Filter is a "dirty" parts, in the use of a period of time, the fuel filter will need to be replaced. So, how to replace the specific, the replacement process should pay attention to what it?

Fuel filter replacement cycle

Most car manufacturers to the external filter of the normal maintenance of the recommended replacement cycle for the replacement of KM; a conservative maintenance recommended replacement cycle is 1.92 ~ km. If you are not sure, please read the owner's manual to find the correct recommended replacement cycle. In addition, when the filter hose appears from dirt, oil and other dirt caused by aging or cracks, need to replace the hose in a timely manner.

Fuel filter (FuelFilters) is recommended replacement cycle should be according to its structure, properties, and uses of the different and somewhat difference, and can not be generalized. If the filter is installed in the fuel line, it is called the external filter (External); on the contrary, the internal filter (Internal) is installed in the fuel pump and the fuel tank inside the filter. The fuel tank filter or the protective sleeve is generally considered to be a maintenance free component.

Fuel filter replacing method

First, relax oil and fuel filter with the clamping device, then removed from the oil in the fuel filter, followed by a stopper circuit, so that you can prevent spillage of fuel.

Most are installed in the oil in the fuel filter are marked with two arrows, one is the fuel into the arrow, the other is a fuel out of the arrow, use the arrow to indicate when the flow of fuel through the fuel filter. So when we install the fuel filter, make sure the direction of the arrow pointing to the engine, which is the flow of the engine oil.

In addition, it should also be noted that the clamping device used in oil is designed, the rubber hose and fuel filter at the combination of these two parts tightly, to achieve the sealing effect. Compared with the ordinary clamping device, the clamping device will cut rubber hose, so it will not cause the damage to the rubber hose, and the clamping device can withstand high pressure. Finally, we should also ensure that the rubber hose clamping device is installed at the correct position and in accordance with the specifications specified junction clamp.

Note: many of the imported fuel filter is a combination of Pipa shaped parts, through the combination part to connect the fuel filter and engine oil. When using the pipa shaped connecting parts, should pay attention to their sealing gasket is does not allow the repeated use of, so for Lute shaped with combined with part of the fuel filter, each maintenance must replace the gasket, to prevent oil leakage.

In addition, this should also pay attention to the combination of Pipa shaped parts, during the installation process can make the connecting thread wrong button, nor in the combination of components exert too big clamping force. In these parts with Pipa shaped sealing ring do not use RTV or other types of. In the installation of the connecting parts, should use the wrench to ensure appropriate clamping force.

If the vehicle is without the need to maintain the fuel system, and only use a built-in to the fuel filter, then in vehicle periodic preventive maintenance process, it is not possible to the oil pump, a filter and a fuel output device all replaced, even automotive preventive maintenance interval is long, it is impossible to do that, because of the high cost of doing. However, if there are signs of abnormal engine performance, or fuel system pressure at the critical value, then check or replace the fuel filter on the inside of the tank is necessary.

After the completion of the maintenance work for the fuel filter to the assembly of all parts and re installed on the fuel pump fuse, then in the ignition system does not work, so that the engine rotates for several laps, until the fuel system in the establishment of the normal fuel pressure so far. At this time, should check the fuel filter and oil leaks. If the test results show that everything is normal, start the engine running a few minutes, and then re check again, to ensure that no leakage happens.

Fuel filter maintenance and replacement is relatively complex, unlike air filter that is easy to operate, but we cannot so will neglect to check the maintenance, otherwise on the fuel filter had no effect.