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 of the fuel filter installed in the oil line is marked with two arrows, one is the fuel into the arrow, and the other is the fuel out of the arrow, with the arrow to indicate the flow of fuel through the fuel filter. So when we install the fuel filter, we must make the direction of the arrow pointing to the engine, that is, the flow of oil to the engine.
In addition, it should be noted that the use of the oil in the clamp device is specifically designed, in the rubber hose and fuel filter combined with the two parts tightly clamped in order to achieve the effect of sealing. Compared with ordinary clamping device, this kind of clamping device will not cut into the rubber hose, so it will not damage the rubber hose, and the clamping device can bear a high oil pressure. Finally, we should also ensure that the rubber hose clamping device is installed in the correct position and in accordance with the specified specifications of the clamp combined.
Note: a lot of imported fuel filter has a kind of combination of the parts, through the combination of the fuel filter and engine oil circuit connected. 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, the use of such a combination of parts should also pay attention to the installation process, the installation process must not be the case of the connection screw thread, and do not impose too large clamping force on the combination part. Do not use RTV or any other type of sealing ring on the part of the combination of these parts. When installing the combined part, a wrench should be used to ensure proper 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 indications that the engine's working performance is abnormal, or fuel system fuel pressure is at a critical value, then check or even replace the fuel filter inside the fuel tank is very 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 point, should check whether the oil filter and oil circuit leakage situation. If the test results show that everything is normal, start the engine running for a few minutes, then, re check it again to make sure there is no leakage.
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.