The hazards of not replacing the fuel filter：

1、The fuel filter is like a mask worn by a person. If the air filter cannot effectively filter the suspended particles in the air, the lighter one will accelerate the wear of the cylinder, piston and piston ring, and the heavy one will cause the cylinder to strain and shorten the service life of the engine；

2、If the gasoline filter is too dirty or clogged, it will cause difficulty for the car owner to start the car, sometimes it takes 25 times to hit the fire. The frightening thing is that the engine stalls while driving. For example, the brakes will fail and the steering will lose control in the bends of the mountain roads. Under normal circumstances, the cars need to be replaced regularly, especially the cars with fake and inferior fuel. Too little gasoline, poor cooling, will burn the oil pump；

3、Too much water in the cup will be mixed with gasoline into the oiler, which will affect the fuel combustion；

4、The gasket is damaged and the oil is leaking; the casing of the gasoline filter is broken and the oil is leaking; the oil pipe joints are loose and leaking and leaking, making the gasoline supply unsmooth; the oil pipe is ruptured or broken, etc.。

The necessity of replacing the fuel filter：

1、In order to ensure the effective protection of the gasoline filter element, usually the car needs to be replaced every 10,000-20000 kilometers；

2、Of course, we still have to make a decision based on the actual situation. If the color of the filter element in the fuel filter is noticeably darkened, it needs to be replaced in time. But it should be noted that when replacing the steam filter, the oil, machine filter, and air filter also need to be replaced. And after installation, be sure to check the tightness of the interface to avoid oil leakage；

3、When the filter element in the fuel filter has been seriously polluted by harmful substances, the color will turn black. It must be replaced. Otherwise, the fuel filter element will not have a good filtering effect, which cannot guarantee the cleanliness of the fuel when it enters the engine cylinder and burns. Not only will the power of the car be severely reduced, it will even affect the service life of the fuel pump；

4、If it is a diesel car, it is even more needless to say, the sulfur contained in diesel will directly react with water to form sulfuric acid, which will corrode the internal parts of the engine.