Why do cars have drainage holes?
As the name suggests, the vehicle drainage hole is the rainy day will discharge the accumulated water on the vehicle to the outlet outside the car, the principle and structure are very simple, but in fact, many owners often ignore these small drainage holes in the car process, failed to clean up in time and eventually lead to water in the car, and even cause irreversible damage to the mechanical parts and electronic devices of the vehicle when serious. There are many cases of car windows and sunroof drainages that cause the windows and sunroof motors to burn out. Do not often check the drain, causing irreversible consequences, I believe that many friends do not know what it means, why some cars are good for 15 years, some cars are only 4-5 years, the body chassis is rusty? There are many drainage holes on the car, but don't underestimate these drainage holes, it is very important to check the dredging frequently.
Although the problem of drainage hole blockage is not common, once it occurs, it is very troublesome, not only full of odor will also affect the future use of the vehicle, but also leave light or heavy water stains on the interior panel, in serious cases, the carpet inside the car is always wet, and even seep water from the carpet when it rains heavily, these situations are basically caused by the drainage hole blockage, resulting in poor drainage.
Drainage hole location:
In general, the drainage hole of the vehicle is in the following parts, the front windshield of the engine compartment, the four corners of the inside of the sunroof, the lower part of the front and rear doors, the inside of the fuel tank cover, the bottom of the spare tire of the trunk, and the gap between the front and rear headlights and the body fins. One of the most prone to clogging is the drainage hole in the engine compartment and sunroof.
Engine compartment drain holes:
The size and layout of the engine compartment drainage holes of different models are different, and the position is basically on both sides of the front windshield wipers. The cabin drain is often also the end of the drainage hole at the front of the skylight, where the accumulated water flows along the A-pillar conduit, where it merges with the cabin water in the fenders and is discharged near the fenders of the wheels. The drain holes in the cabin are located at the air conditioning inlet under the windshield, and owners who have cleaned the cabin by themselves will surely remember the dirty hygiene dead ends on both sides of the cabin. In these several drainage holes, the cabin drainage hole is the most likely to block one, and because it is very close to the air conditioning inlet, bacteria in the sweltering cabin are very easy to breed, although the probability of water entering the air conditioning filter is not very high and the paper filter will absorb most of the water, but the air quality at the air inlet is not optimistic.
All car front rails have a drainage system underneath the glass
Some of the cabin drainage complex points, the road is a small drainage hole in the red circle position, usually the wiper and small rainwater are discharged from the small hole, heavy rain and even heavy rain will be discharged through the second mesh screen and both sides of the cabin, which is the position of the blue circle. It is recommended to check here more often, there will be leaves or something, regardless of the drainage problems
Sunroof drainage hole:
Skylight drainage hole is located in the four corners of the skylight, even if the sunroof is closed on rainy days, rainwater will flow into the car from the gap in the skylight, the current vehicle is designed with a water barrier tank, rainwater will be along the guide groove from the front and rear drainage holes through the A column / C column and finally discharged from the bottom of the car, unless the left and right two drainage holes are blocked at the same time, the general sunroof will not appear to accumulate water.
If the owner has not opened the sunroof for a long time, the probability of 4 drainage holes at the skylight is not large, and blocking one is not enough to make the water flood into the car, most of the time the water is due to the rubber gap seeping water, the interior panel moisture is the performance of the sunroof drainage hole blockage, the sunroof drainage pipe falling off will also lead to moisture on the interior panel, the damp interior will not only bring unpleasant musty smell, but also breed bacteria.
Door drainage holes:
Door drain holes are generally located in the lower part of the door panels, where there are generally at least two. Most models do not have separate drainage pipes inside the doors, and rainwater flows directly through the rust-resistant door panels. Due to the low location of its drainage hole, long-term driving on the muddy road of the vehicle, the drainage hole is easy to be sealed by the silt, the owner must pay attention to the inspection, once the water in the door, the door panel inside the thin layer of waterproof film is unable to block a large amount of rain erosion, the water residue in the door panel will be damage to the window regulator, audio and central control door lock. Many netizens often hear the sound of water when driving, which is mostly caused by water in the door panel.
Four doors and tail box doors have several drainage holes, special reminder, if you find that the door is inserted in the business card, do not open the window to take, it is easy to fall into the car, business card rainwater expansion will block the door drainage hole, before driving first check a circle, remove those messy advertising business cards.
Air conditioning drains:
The role of the air conditioning drain is that when the air conditioner is used, the evaporation box condenses the moisture in the surrounding air into water during the heat exchange process, and is discharged through the air conditioner drain, which is why after the air conditioner runs for a period of time, there will be a beach of water traces at the bottom of the car. New owners will wonder if the car is leaking when they encounter this situation, in fact, there is no need to worry. The air conditioning drain is generally located in the lower part of the evaporation box through a hose connected to the chassis, once the air conditioning drain is blocked, the water will enter the co-driver's foot pit through the connection to soak the wet foot pads and other items, the owner is very easy to detect.
The air conditioning drain hole is located in the co-driver position under the chassis of the front point in the summer to turn on the air conditioning here There is water on the ground normally
Trunk drain holes:
In general, the trunk does not easily enter the water, and the rainwater seeping into the trunk is often discharged through the drainage channel near the taillights through the rear fenders. When encountering extreme situations such as vehicles being soaked, it is often necessary to manually open the trunk drain when it is necessary to drain the trunk water as soon as possible, depending on the vehicle, the trunk drain is usually designed as 1-2. Due to the low utilization rate, usually the manufacturer will block the drain, and when used, it can be unscrewed or poked open.
Several cases of water accumulation have been found on the network under the trunk spare tire It is recommended to check the luggage rack interface and taillights 4S to check the cause of the water leakage
Silenced drum drainage hole:
The tail exhaust silencer drum style and design are different, and some models directly discharge the exhaust gas and water after the combustion of the car through the exhaust cylinder
Causes of clogged drainage holes:
The accumulation of impurities such as leaves falling from the trees is the main cause of the blockage of the vehicle drainage hole, and the accumulation of fallen leaves and rot will often cause some insects, and if these rotten leaves and insect remains are not cleaned up for a long time, they will enter the engine compartment, causing the drainage hole to be blocked. In addition, the dust attached to the exterior of the vehicle is often hit by the high-pressure water gun to the crevice of the body during the car wash, forming a muddy substance, which is also easy to block the drainage holes and drainage channels in the car after drying up.
Hazards after clogging of drainage holes:
Once the vehicle drainage hole is blocked, the speed of discharge of water in the car will slow down, eventually resulting in a large amount of water stored in the car, and a part of the water will flow along the drainage pipe inside the Ixiang car, eroding the interior and instruments. Another part of the cabin will seep into the engine compartment through the seal strip, and in severe cases, it will cause damage to mechanical components and engine circuit systems.
How to clean the drainage holes of your car:
When the vehicle is not drained, we need to determine which part of the drainage hole or drainage pipe is the problem according to the location of the water, for example, if there is a water stain near the roof and the sunroof in the car, it can basically be concluded that the problem comes from the sunroof. After identifying the drainage hole, we need to clean up the debris near the drainage outlet. It should be noted here that for the sunroof and other hidden hoses in the car, hard objects such as wires should not be used to dredge, so as to avoid these hard objects from rupturing or falling off the hose. The inspection of the drainage holes in the cabin and the sunroof can be done by dumping water to observe the drainage of the vehicle. If the water accumulates in the drainage outlet and is not discharged smoothly, there is a foreign body in the drainage pipe and needs to be cleaned up in time.
Daily car owners can DIY clean the sunroof drainage hole, and the syringe is commonly used to clean with the method of catheter injection. Fill the syringe into clean water, insert the catheter into the skylight drain, quickly inject the water in the syringe into the hose, and repeat several times to complete the cleaning.
In addition to the injection method, it is also a common method to clean the drainage pipe with a high-pressure gas gun. The drainage hose of the model adopts a monolithic design, and there is no need to worry about the hose falling off when cleaning with a high-pressure gas gun. (Note: As mentioned before, some models of sunroof drainage hose use two-stage connection, such models need to pay special attention to prevent the hose from falling off)
In addition to the sunroof drainage hole connected to the hose drainage, the drainage outlets of the doors, engine compartment, front and rear tail lights, etc. are basically discharged directly through the drainage channels inside the doors and the front and rear fenders. For these drains without hose links, it is relatively simple to detect, observe the drainage route, and clean up the debris on the route. The door drainage hole can be dredged by hard objects such as wire, and special attention should be paid to cleaning the drainage hole hidden in the rubber seal to avoid damage to the seal.
Every time I wash the car yard and park well, I have to open the cabin to check the various liquid levels, and at the same time clean up the garbage near the drainage hole in the cabin, wipe the dirt in the skylight, and there is no problem at present! Remind the riders, especially the riders in the north, after replacing the winter glass water after entering the winter, remember to use a few rear window cleaning functions, so that the rear window glass water pipe connecting the front of the car to the rear of the car is filled with antifreeze glass water, otherwise the temperature drops below 0 degrees, and the non-antifreeze glass water in the pipeline will freeze to break the pipeline, resulting in glass water leakage, glass leakage in the car, and maintenance will be troublesome.