White smoke comes out of the exhaust pipe of the vehicle, which is serious when the car is cold, and

Cause analysis: This is because gasoline contains water, and the engine is too cold, and the fuel entering the cylinder is not completely burned at this time, resulting in fog spots or water vapor to form white smoke. In winter or during the rainy season, when the car is first started, white smoke can often be seen.

Solution: It doesn't matter, as soon as the engine temperature rises, the white smoke will disappear. This condition does not need to be serviced.

There are many reasons for white smoke, mainly in the following aspects:

1. The engine temperature is too low. Some diesel fuel turns into oil vapor when it is not burned, and is discharged from the exhaust pipe with the exhaust gas, emitting white smoke.

2. There is water in the oil supply system. There is water in the fuel or combustion chamber, and the water is heated into water vapor by the heat released by combustion in the cylinder, which is discharged from the exhaust pipe to form white smoke.

3. The injection time is too late. Due to the late injection time, the temperature of the cylinder has dropped during the fuel injection, and part of the diesel fuel has not been burned into oil vapor, emitting white smoke.

4. Poor atomization of fuel injectors. Poor atomization leads to incomplete combustion of diesel, and the high-temperature exhaust gas discharged from the normal working cylinder merges in the exhaust pipe, resulting in white smoke.

5. The cylinder pressure is too low. Some diesel fuel turns into oil vapor without combustion, so white smoke is emitted from the exhaust pipe.

This is because gasoline contains moisture and the engine is too cold, when the fuel entering the cylinder is not completely combusted, resulting in fog spots or water vapor to form white smoke. In winter or during the rainy season, when the car is first started, white smoke can often be seen.

Fault diagnosis and troubleshooting.

1) When the cold car is just started in winter, a lot of white smoke comes out of the rear exhaust pipe of the engine. However, after running for a period of time, as the engine temperature rises, the white smoke gradually disappears, and then normal, it means that the engine temperature is too low and there is no need to exclude.

2) The diesel engine is weak and emits white smoke. You can put your hand close to the exhaust pipe, when the white smoke passes over the hand surface and there are water droplets, it means that there is water in the cylinder, at this time, you can use the single-cylinder oil cut-off method to find out the leaking cylinder.

3) When the diesel engine emits white smoke, the working temperature of the engine can be increased, such as when the water temperature is about 70, the exhaust smoke color changes from white smoke to black smoke, it can be judged that the injector atomization is poor and dripping. Use the method of cylinder-by-cylinder oil cut-off to find out the faulty injector, and then check the injector; If there is oil dripping during oil injection, it should be further checked whether it is caused by too low injection pressure or due to deformation or even excessive wear of the needle valve body, so as to improve.

It is normal for a vehicle to emit white smoke from the exhaust pipe of a cold car. Fuel is composed of hydrocarbons, carbon dioxide and water are generated after combustion, due to the high temperature at the time of combustion, the water is discharged to the exhaust pipe in the form of water vapor, the temperature of the exhaust pipe of the cold car is low, and the water vapor meets the exhaust pipe of the low temperature to form fine water droplets and become white smoke. When the temperature of the exhaust pipe of a hot car rises, the water vapor cannot form fine water droplets, so there is no white smoke.

1. White smoke from the exhaust pipe is the water vapor discharged from the exhaust pipe.

2. If the cooling water of the water tank is reduced: it means that the engine cooling channel or cylinder gasket is damaged, which causes the cooling water to enter the cylinder for combustion.

3. There is no shortage of cooling water: caused by water entering the exhaust pipe for some reason (rain or car washing).

4. White smoke from the exhaust pipe is absolutely abnormal. It is best to detect the cause, otherwise the exhaust pipe will cause corrosion to the exhaust pipe for a long time, and the exhaust pipe will be rusted and damaged in advance.

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White smoke from the exhaust pipe of the vehicle, serious when the car is cold, and no white smoke is emitted after the car is hot.

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Hello, I am helping you sort out the answer to the question, please wait a while In this case, this phenomenon occurs when the car is cold, mainly because the temperature is relatively low in the case of the cold car, the engine combustion is not good, and the engine cold car has just started, the oil supply is relatively large, so there will be this white smoke phenomenon, most of the cars are like this when the car is cold and started, this is a normal phenomenon, there is no problem.

If there is only a cold car when starting, there is no problem, normal situation.

In winter or rainy season, when the car is first started, colorless and odorless white smoke comes out of the exhaust pipe, which is normal; If the white smoke coming out of the exhaust pipe has an odor, this is not normal.

Under normal circumstances, the so-called "white smoke" from the exhaust pipe is not worthy of the name, and it is more appropriate to call it "white fog". White mist is water vapor, one of the products of gasoline after full combustion is water, which is formed by exhausting at high temperature, and water vapor will condense into water when the weather is cold. So in most cases, it is not a fault that there is "white smoke" coming out of the exhaust pipe.

However, it is also possible that part of the coolant enters the cylinder, and with the exhaust gas discharge, because the temperature is very high, it will appear in the form of water vapor, so when it is found that a large amount of white smoke comes out of the car exhaust, the coolant is consumed very quickly.

In addition, the engine oil will also flow into the water tank, you will see that there is oil in the antifreeze, and it is possible that the oil level of the engine is higher than the normal oil dipstick oil level, and at the same time, with the decline of engine power, the engine will appear high, the water tank will be boiled, and even the exhaust pipe will be discharged.

When the mixture concentration is high, the combustion is not complete, and the exhaust smoke will appear, as long as the engine temperature is normal, the white smoke weakens or disappears, there is no problem. Hope it helps, I wish you a pleasant stay.

At the beginning of the start, the weather is relatively cold, so the combustion is not very sufficient, and white smoke will appear.

It doesn't matter, as soon as the engine temperature rises, the white smoke disappears. This condition does not need to be serviced.

This situation is relatively normal, the white smoke emitted from the exhaust pipe of the vehicle is actually evaporated water vapor, and the engine exhaust temperature is high, and when the ambient temperature is low, white smoke will be formed. However, this white smoke is not the same all the time, sometimes more, sometimes less, and sometimes not, which is also related to the amount of water in the exhaust pipe and the heat. In addition, due to the low engine temperature and insufficient combustion when the car is cold, there may be some oil that has not been fully burned and discharged, which is involved in the exhaust gas, forming a relatively large smoke, which is a normal phenomenon.

1.The temperature is not enough, because the engine temperature is not enough, the mixed gas formed by the fuel and air injected into the cylinder, part of it cannot be burned, and the exhaust pipe emits white smoke. Therefore, after the locomotive starts, attention should be paid to the insulation of the water tank, and the middle throttle is used to run so that when the locomotive temperature reaches more than 50 degrees, the load is gradually increased.

2.There is water in the diesel, and there is water in the diesel, which directly affects the normal combustion of the mixed gas and emits white smoke. At this time, the precipitated oil should be released, the stagnant water should be discharged, and the diesel fuel should be replaced if necessary.

3.If the exhaust pipe continues to emit white smoke, it may be that the cylinder head and gasket of the individual cylinder are damaged and water is ingressive, so it should be removed for inspection and the damaged cylinder head should be replaced.

It doesn't matter, as soon as the engine temperature rises, the white smoke disappears. This condition does not need to be serviced.

The car engine starts working, and gasoline burns to produce heat. The water vapor turns into small droplets when it is cold, and then it becomes white smoke, and the hot car does not emit white smoke.