In order to prevent the fuel tank cap from being screwed loosely, it must be screwed until there is a rattling sound.
If the tank cap rings once or twice, it will be tightened. Usually, if the seal ring of the fuel tank cap is good, tighten it at the sound of a click. Because the fuel tank is equipped with a tightening alarm device, the fuel tank cap will ring to indicate that the requirements have been met. Here's why you can't add fuel:
1. To prevent waste: In order to prevent the volume expansion of gasoline and rupture of the tank, there are usually air holes in the design of the tank. If the gas is too full, the gasoline will overflow through the exhaust port.
2. Blockage of the exhaust hole: too much gasoline in the tank will cause blockage of the exhaust hole, but will cause poor oil supply, and even poor oil supply.
3. Harm to carbon tank: Carbon tank is used to absorb gasoline vapor, one is to prevent gasoline volatilization into the air to pollute the environment;
The second is to save energy and reuse these volatile gasoline. If the gasoline is too full, it will spill into the carbon tank and directly damage the carbon tank.
As long as a sound even if it is tightened, this sound is issued by the torque device inside the fuel tank cap, and then how many screws are so strong