Fuel filter, the replacement recycle should be different according to the structure, performance and usage and so on. If the filter installed the fuel channel, it will be called outside filter. On the other hands, inside filter is installed between the fuel pump and fuel tank. Among the fuel tank or its protective casing, which is usually regard as the maintenance free part.

 Most automobile manufacture, the replacement cycle that they recommend for outer filter is 4.8KM and the conservative suggested replacement cycle is from 1.92 to 2.4km, it can refer to the the owners’ manual. Besides, when the filter tube appears aging or crack that caused by mud or oil , it needs to replace this tube timely.

Many imported car fuel filter adopted the drum type tube to connect. In order to ensure the reliability of the connecting sealing, it cannot use the same sealing gasket repeatedly, besides even if adopt the new sealing gasket, it needs to check the sealing property after connection. When the fuel system need to replace O-ring, it needs to confirm the size of the O-ring accurate and check whether the spring and hardness appropriate.

The fuel system without loop just have inside filter( in fuel tank). Although all in one pump, filter, transport unit price is expensive, but when the fuel transportation is blocked of the engine performance is decreased because of this, it needs to do appropriate maintenance and timely. At the same time, it needs to check all the obstacles in all the fuel tank, as well as the crack and hemming condition.