In some newly purchased cars, the headlights will fog up after being driven for a period of time, and in severe cases, there will be water droplets inside the lampshades. This situation not only affects the use of headlights, but also makes driver friends a little worried. What is going on? Is the sealing of the lampshade not done well?
In fact, whether it is an ordinary halogen headlight, a xenon headlight, or an LED headlight, as far as the overall structure of the headlight is concerned, there will be a ventilation rubber tube. When the headlights are used, heat is generated, and the function of the breather pipe is to discharge this heat and maintain the normal operating temperature of the headlights. On the other hand, moisture in the air will enter the headlight through the breather tube and adhere to the lampshade. As the water vapor gathers, water droplets will flow down the lampshade. This situation is mostly caused by large temperature differences, and is most likely to occur in winter and rainy seasons.
This situation is a normal phenomenon. Drivers do not need to worry too much, because after the headlights are turned on and work for a period of time, the mist will be discharged out of the lights through the ventilation rubber tube along with the hot air. This will basically not damage the headlights and of electrical circuits.
Do not act rashly when the headlights are foggy and have water droplets. Some anxious drivers will find some tools to bake the headlights, because there are a lot of plastic materials in the headlights, and the life of the materials will be easily lost during high-temperature baking. , and even deformation makes the situation worse.
In addition to the weather, foggy headlights and water droplets may also be caused by other reasons, such as car washing and vehicle wading. When the vehicle is wading, because the engine and exhaust system themselves are relatively large heat sources, rainwater will A large amount of water vapor will be formed above, and some of the water vapor will enter the headlight along the breather pipe. This is especially true for car washing. Many car owners like to use high-pressure water guns to flush the engine directly. However, the accumulated water after flushing is not dealt with in time. After closing the engine cover, the water vapor cannot be discharged quickly, and the water vapor trapped in the engine cabin is Possibly entering the headlight from the vent rubber tube.
For cleaning work in the engine compartment, we should wipe it with cotton or cloth, or use high-pressure air blowing to avoid "moisture" in the engine part as much as possible.
The above are all cases of slight fog or water droplets inside the headlights, which will usually disappear on their own after a certain period of time. If the situation is serious and it is a new car, it is recommended to ask the manufacturer or 4S store for replacement or repair, or you can open the lamp cover, dry it, and check whether there is any damage or leakage on the surface of the headlight. If there is no damage, , replace the headlight rear cover seal and breather pipe.
In winter and rainy seasons, drivers are advised to check the condition of their headlights regularly. After wading in the water, it is even more important to check in time. Also, if you find that the engine compartment is dirty, it is recommended not to flush it with water!
(Pictures and texts come from the Internet)
