[Exhaust pipe] What is the reason for exhaust pipe dripping? Common knowledge on exhaust pipe maintenance
What is the reason for water dripping from the exhaust pipe?
In fact, water dripping from the car exhaust pipe is a very normal phenomenon. This shows that the engine is working normally and the combustion is sufficient. The engine atomization effect is good. If the car exhaust pipe emits water, The foggy exhaust gas indicates that the engine is in good condition (this can be seen in winter).
The principle of water dripping from car exhaust pipes
Water dripping from car exhaust pipes is because water and carbon dioxide are generated after complete combustion of gasoline. Water at high temperatures It is water vapor. Water vapor is colorless and transparent at high temperatures, but when the temperature is lower than 100 degrees, the water vapor will condense into water. If the condensed water droplets are small and suspended in the air, the water vapor will appear white. When the ambient temperature is low, the white smoke coming out of the exhaust pipe is water vapor; if the condensed water droplets accumulate, it turns into water.
Three situations when water drips from car exhaust pipes
1. Water vapor evaporates when it is sprayed out
It will spray water when water vapor condenses into water droplets in the exhaust pipe. You may sometimes see white smoke emitting from the exhaust pipe; this is usually when a car parked in winter or rainy season is started for the first time. However, if the white smoke will disappear once the engine temperature rises, there is no need to worry about this situation and no maintenance is required.
2. The exhaust pipe will spray black smoke or even drip “black water”
This phenomenon means that the engine is eating oil, so be careful Remember to check the oil level before going out. If the exhaust pipe turns to black smoke after the engine temperature rises, it means that the cylinder pressure is too low or individual cylinders are not working, which should be checked and eliminated, and you need to go to the service station for maintenance.
3. When the engine is running, the exhaust pipe emits a large amount of water vapor and white smoke
Check whether there is water in the fuel tank, check whether the cylinder gasket is damaged, and whether the cylinder head is damaged. Whether there are cracks in the body, whether the cylinder liner sealing ring is in good condition, etc.
Warm Tips:
Dripping water from the car exhaust pipe indicates that the engine is working well, and it can be photographed The exhaust gas with fog indicates that the engine is in good condition, but if a large amount of water is deposited in the exhaust pipe, it will accelerate the corrosion of the exhaust pipe, so it must be cleaned in time.Manage exhaust pipe dripping.
How to clear exhaust pipe dripping:
After a while, on a slope, with the front of the car up and the butt down, hit the accelerator a few times , let the dripping water in the exhaust pipe be drained out in time. If the dripping water from the car’s exhaust pipe is serious, it is best to go to a 4S shop or car repair shop for a comprehensive inspection.
Exhaust pipe maintenance common sense
About preventing muffler corrosion:
1. Prevent the inside of the muffler Water ingress. When driving or washing the car on rainy days, prevent water from entering the muffler. When water enters, the engine should be started and idled to warm up the car for at least 10 minutes to drain the internal water as much as possible. This item is crucial!
2. It is recommended to apply anti-rust oil inside the muffler (four-stroke engine oil can also be used instead). The specific method of refueling is:
(1) Remove the muffler and plug the middle part of the muffler. Drain hole at the lowest position (it is recommended to stick it with tape);
(2) Add about 50ml of anti-rust oil from the flange connecting the muffler to the engine, and shake the muffler to allow the anti-rust oil to enter the cylinder evenly. Then install the muffler;
(3) After starting the engine, as the temperature of the muffler gradually rises, the anti-rust oil will volatilize after being heated, and blue smoke will emit from the tail of the muffler. But the blue smoke will disappear after driving 20 kilometers. After the blue smoke disappears, remove the blockage in the drainage hole;
(4) It is recommended that the new car be refueled and maintained once every six months.
About preventing the discoloration of the muffler:
1. When the car is difficult to start when it is cold in winter, close the choke and start the engine. After the car is warmed up, be sure to close the choke. Open promptly. It is prohibited to drive at high speed for a long time with the choke closed;
2. It is forbidden to install a windshield or other decorative items in front of the engine and muffler on riding bicycles (men’s bicycles), which will affect the engine and muffler. heat dissipation;
3. Do not drive in low gear with heavy load for a long time, which will cause damage to the engine and muffler;
4. Do not hit the accelerator at high speed for a long time. ;
5. When there is oil on the surface of the muffler, the surface color will change to yellow, blue, etc. after the car is heated. In addition, when there is a large amount of dirt and other dirt stuck to the surface of the muffler, please clean it in time to avoid affecting its heat dissipation;
6. When installing the muffler, pay attention to the muffler pad being installed in place and tightened to prevent Air leakage will affect the muffler effect and cause the muffler interface to turn yellow;
7. The engine valve clearance, carburetor, air filter, etc. should be adjusted and cleaned promptly and correctly according to the vehicle instructions. If the valve clearance is too small or the mixture is too rich or too lean, it will affect combustion and cause discoloration of the muffler.
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