Does the absence of water affect the diesel engine

When it comes to the issue of diesel engine cooling.

Diesel engine cooling, according to the cooling medium, there are two categories: air cooling and water cooling. Air cooling, as the name suggests, is the use of air (wind) as a cooling medium to absorb and take away part of the heat of the diesel engine. The cooling medium for water cooling is water.

Air-cooled, generally used for small, low-power diesel engines. For example, small, domestic generators or locomotives.

Because the specific gravity of air is low and the inertia is small, it is easy to be disturbed by the external environment in the process of cooling flow, which makes the speed and direction of air flow easily change, affecting the cooling effect. At the same time, the specific heat ratio of air is small, and the temperature rises significantly after absorbing heat, and the temperature difference between air and the body will soon become smaller, and the cooling effect will decline quickly.

Water-cooled, generally used for medium-sized and large diesel engines. Compared with air cooling, water cooling has obvious advantages, good and stable cooling effect, and convenient control and adjustment. Therefore, generally diesel engines are cooled with water.

The front is popular science, and now it is the text.

If the water-cooled diesel engine loses cooling water or the cooling water pressure is insufficient, it will cause insufficient cooling. That is, the heat taken away from the diesel engine is not enough, which makes the diesel engine temperature rise.

The hazards caused by excessive temperature of diesel engines can be understood from the following aspects:

1. If the temperature is too high and the strength of the metal material is reduced (it becomes soft, striking while the iron is hot), it will lead to the rupture of diesel engine parts, and in serious cases, it will lead to the direct disintegration of the diesel engine;

2. If the temperature is too high, the expansion of metal materials will become larger, and the normal gap between the diesel engine will be destroyed, such as the gap between the piston and the cylinder liner will become smaller, so that the diesel engine can not work normally, such as pulling the cylinder, etc.;

3. If the temperature is too high, the temperature of the lubricating oil will increase, the viscosity of the lubricating oil will decrease significantly, the diesel engine can not be lubricated normally, and serious friction will occur between the parts of the relative movement. For example, between the connecting rod and the crankshaft, there is a sway.

4. If the temperature is too high, fresh air will be overheated when it enters the cylinder through the cylinder head. At this time, the temperature of fresh air is too high, the density is significantly reduced, and the quality will be significantly reduced under the condition that the intake volume remains unchanged (or the volume of a cylinder), resulting in insufficient air intake of the diesel engine, the diesel fuel can not be completely combusted, and the power of the diesel engine will decrease significantly.

Therefore, when the water-cooled diesel engine is running, it is necessary to pay close attention to the cooling water pressure and temperature, otherwise, it is very easy to cause serious accidents.

Pull the cylinder! Because the diesel engine will produce high temperatures when it is working.

Water has a cooling effect! If there is no water to cool down in the tank.

The body can easily cause engine cylinders or crankshaft breaks! In short, it will affect engine performance.

Decreased engine power or increased oil consumption (in severe case hot cars, oil is injected outward from the oil filler of the engine).

In the process of continuous circulation of engine oil in the lubrication system, its own active ingredients will be continuously consumed, and at the same time, there will be some foreign substances such as moisture, fuel, sand and dust impurities mixed in, so that the performance of the engine oil will decline, and even lose the protection of the engine.

Hazards of mixing water with lubricating oil. According to the regulations, the water content in the lubricating oil should be below 0 03, when the water content exceeds 0 1, the additives in the lubricating oil (antioxidants, cleaning and dispersing agents, etc.) will fail, thus accelerating the oxidation of the lubricating oil. Under the action of high temperature inside the engine, the lubricating oil reacts chemically with the coolant, and the lubricating oil is emulsified into an emulsion, which greatly reduces the lubrication effect.

When the organic acids produced by the oxidation of lubricating oil react with water, inorganic acids are formed. These acids can cause corrosion to engine components. When the lubricating oil contains a lot of water, it can lead to premature deterioration of the lubricating oil and rust of the parts, and at worst, it can cause serious mechanical accidents such as engine pads or cylinder pulling.

If the lubricating oil gets into the coolant, it will form a viscous mixture on the inner wall of the radiator and engine cooling water, which can seriously affect the heat dissipation of the engine and cause the engine to become too hot.

When the oil contains excessive water, the performance of the oil will decrease, and the excess water will reduce the performance of some additives in the oil under certain conditions, and even fail, which will destroy the viscosity of the oil, so that the oil can not form a good lubricating oil film on the moving friction pair, so that the machinery will produce abnormal wear and tear, and even lead to mechanical failure. Generally, when the oil contains excess water, the oil will be emulsified, showing a milky white foam state, in this case, in order to avoid damage to the engine, it is best to go to the repair shop to find out the cause of the problem and rule it out, and then clean the engine and change the oil [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

It may be that the cylinder gasket is broken, the oil is flooded, the cylinder gasket is replaced, and the cylinder is turned off for a long time. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Crankshaft shoeing, piston pulling cylinder, it is recommended to change the oil immediately, check whether the cylinder gasket is aging [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Who has ever seen a diesel engine fly after entering the water.

Summary. How long can a diesel engine last without water is as follows, dear, hello, the diesel car can only run for about ten minutes without water. The 10 minutes mentioned here is only in the case of no load, and if it is heavy, it can only be exercised for about five minutes.

At that time, the dashboard shows high temperature and water shortage, the engine fault light will be on, and it needs to be stopped in time for inspection and repair. If it is not overhauled in time and continues to be exercised, the cylinder liner piston of the engine will lock up the cylinder, and it will be overhauled and replaced with four sets at that time.

How long can the diesel engine last without water is as follows, dear, hello, the diesel car can only run for about ten minutes without water. The 10 minutes mentioned here is only in the case of no load, and if it is heavy, it can only be exercised for about five minutes. At that time, the dashboard shows high temperature and water shortage, the engine fault light will be on, and it needs to be stopped in time for inspection and repair.

If it is not overhauled when it is not timed, and continue to exercise, the cylinder liner piston of the engine will be locked to the cylinder, and it will be overhauled and replaced by four sets at that time.

If you do not have a load or a very small load can run for a short time of 20 minutes, otherwise it will cause serious failures such as cylinder pulling, snap ring, piston roof and cylinder head cracking. The high temperature generated by diesel combustion, the friction between the piston ring and the cylinder wall, the friction between the connecting rod sleeve and the piston pin, and the heat generated by the friction between the spindle and the pad can not be dissipated and cooled, which seriously leads to the piston stuck in the cylinder, and the spindle and the bearing die.

Summary. <>

<>Thank you very much for waiting, I put your question on the back for you;; The high temperature generated by diesel combustion, the friction between the piston ring and the cylinder wall, the friction between the connecting rod sleeve and the piston pin, and the heat generated by the friction between the spindle and the pad cannot be dissipated and cooled, which seriously leads to the piston stuck in the cylinder, and the spindle and the bearing are locked.

Is it harmful to run out of water for ten minutes when a diesel engine starts?

Hello noisy, I'm glad to be able to answer your questions for you, please wait two minutes, Brother Shenghui, I see your question here, and I'm going to inquire about the relevant information for you, the teacher also needs time to type, please be patient and wait for two minutes! Please don't end the consultation |! <

<>Thank you very much for waiting, I put your question on the back for you;; The high temperature generated by the combustion of the diesel branch, the friction between the piston ring and the cylinder wall, the friction between the connecting rod sleeve and the piston pin, and the heat generated by the friction between the spindle and the pad cannot be dissipated and cooled, which seriously leads to the death of the piston stuck brother in the cylinder, and the locking of the spindle and the bearing.

It is generally best not to start the diesel engine for more than 2 minutes without the scenery and water, and it is not allowed to run at high speed. In addition, cooling water should not be added immediately after operation in the case of water shortage, and the cylinder liner will burst due to the sudden cooling of the cylinder liner at a high temperature.

Will adding water damage the cylinder gasket?

Add water after 10 minutes of exercise.

In the state of dry boiling of the water tank due to lack of water, the cylinder gasket will be damaged. It will be alkaline for a long time.

<> kiss, Xiangsui doesn't understand anything, or don't understand, you have to say it, I'll also explain to you, if I help you, I also ask you to give an evaluation or like, I would like to encourage you!

Put the diesel engine in a warm place, drain the water and add water. If there is no shortage of water, a lot of it is not boiled. That proves that the diesel engine is not frozen out.

The diesel engine is not frozen with water:

1. The diesel engine is frozen without water, and the general situation is that the water plug of the bowl-shaped plug on the body or cylinder head will fail to seal it, so first of all, you have to check whether there is water seepage at the water plug of the bowl-shaped plug of the two when the engine is running (the cover on the cylinder head must be removed, because there are generally stuffy holes on the top surface of the cylinder head).

2. If there is a need to replace the corresponding bowl-shaped plug in time, if the engine does not work properly after replacing the bowl-shaped plug and still suspect that there is leakage, then the body must be removed from the cylinder head and checked by Wang Song (if the body or cylinder head body is frozen and cracked, the body or cylinder head should be replaced.

4. Look at the actual ambient temperature of the diesel engine, the water plugging is normal, and the possibility of cracking of the general body and cylinder head is small (which indicates that the temperature in the diesel engine may not be below 0 degrees at that time), and it really depends on where the body or cylinder head is cracked.

5. Only remove the body and cylinder head to test the leakage (seal the inlet and outlet of the body or cylinder head water jacket, leave only one air inlet, and fill it with compressed air, at this time the body or cylinder head is placed in the water, if there is cracking, there will be bubbles at the cracking.

The reason why the diesel engine is not frozen by water release:

6. The water in the water tank is not exhausted. Generally, when discharging water, it is considered that it has been drained when there is no water at the switch of the water tank, but in fact, there is still a very small amount of water in the cylinder head of the machine. This bit of water is enough to freeze the water out of place, to drain the water in the machine, first wait until the opening does not run water, and then shake the diesel engine.

If a diesel engine is used in a vehicle, the agricultural vehicle is pushed back and forth, and the residual water will flow out.

7. Water plugging aging. The following situations occur when the water plug is out of place or aging. 1.

It's harder to start than usual. 2.The throttle is unsteady, big or small, occasionally"Flying cars"phenomenon.

3.Spray oil at the radiator. In the face of these phenomena, many agricultural mechanics will open as long as the machine can move, which is very wrong.

8. The length of time for agricultural mechanics to use diesel engines or agricultural vehicles is different, and the structure and maintenance skills of agricultural vehicles are very different, such as water plugging faults, sometimes they can find out in time, and can replace the water plugging by themselves, and some agricultural mechanics do not know that the water is blocked in the first place. So in any case, stop after a water blockage, and don't force it to drive.

You can only tow the vehicle to a 4S shop or a professional repair shop to find a professional technician to judge and solve, if the water is too much, you need to disassemble the engine and clean it thoroughly.

Since water is heavier than gasoline, the moisture in this physically synthesized "water-blended gasoline" is deposited at the bottom of the tank. When the amount of water is not large, the water cannot reach the inlet of the oil pump, and will not be pressurized to the gasoline nozzle of the engine, so it will not affect the operation of the engine. However, the accumulated moisture level at the bottom of the fuel tank will one day be higher than the inlet of the fuel pump and be transported to the fuel line, which will lead to damage to the vehicle.

To check if there is water in the engine diesel, you can loosen the high-pressure oil hose fastening nut while the engine is running, so that it can spray oil into your hands. Diesel fuel spreads quickly on your hands, and water forms dewdrop-like balls on your hands. There is water in diesel fuel, which can be removed by the following methods:

Turn off the fuel tank switch, remove the oil pipe, and then turn it on. Let the water flow in the container, turn off the switch when the diesel fuel flows out, and install the oil pipe. The effluent in the container is precipitated, and after the oil and water are separated, the upper diesel fuel is poured back into the tank.

Remove the plug under the filter to allow the diesel fuel to flow into the container. Tighten the plug after the diesel fuel flows out. The effluent in the container shall be treated in the same way as above.

Can the diesel engine still work if it enters the water, hello, the engine is flooded, and it can start normally, the impact is: 1There is a situation where the water ingress will damage the connecting rod, that is, if the car accidentally enters the river (the engine is running), the river water enters the cylinder, and the engine is turned off, in this case, the connecting rod may be bent and damaged.

2.If the car is parked in the underground garage and flooded, it can operate normally as long as the water inlet treatment is done (remove the water inside the generator, replace the lubricating oil, replace the three filters, clean the circuit, check the gear oil of the gearbox, change the gear oil if necessary, and check the braking system). There is no need to worry about damage to the connecting rod and other parts, as it is not injured by external forces.

What to do if the engine gets water in rainy days: 1If there is a water ingress and stalling during the wading of the vehicle, turn off the ignition switch immediately, do not try to start the engine again, move the vehicle to a safe place, and try to make the vehicle high and low in front and back, so that the water entering the exhaust pipe can flow out and avoid damage to the three-way catalytic converter and muffler.

2.After judging the exhaust pipe, if the rainwater enters the engine, the spark plug should be removed, and the motor should be used to transport the motor after artificially cutting off the fuel supply system and ignition system, so that the water entering the engine can be discharged smoothly. At the same time, check the oil status of each system of the vehicle, and replace it in time if there is foaming and turbidity.

After the test is completed, compressed air should be used to clean the electrical connection parts inside the engine compartment to prevent corrosion caused by moisture accumulation in the electrical connection parts. The key removal areas are: fuse boxes, sensor plugs, and water accumulation in the body.

After the cleanup, the vehicle road test is carried out to confirm that the engine is free of abnormal noise during driving. If there is significant driving noise, check the engine bearings and rotating parts. 3.

If the water enters the compartment in the wading, the maintenance process is mainly to clean up the water in the car, and there are several sealant plugs located in the lower part of the vehicle chassis, and the water in the compartment can be released when the rubber plugs are opened. However, due to the strong water absorption of the interior decoration material floor glue, the floor glue should be removed and placed in a spacious space to facilitate the evaporation of water, and after installation, it is also necessary to pay attention to turn on the air conditioner, adjust the vehicle circulation switch to the internal circulation, so that the water vapor in the compartment is discharged from the car through the air conditioning system, which is a very fast dehumidification method in summer. 4.

Chassis parts are prone to deterioration of lubricating oil during wading, especially when it comes to steering, transmission and other systems. For example, the maintenance manual requires the Land Cruiser to grease the chassis components after wading through water. At the same time, you should listen carefully to the chassis for abnormal sounds during the road test, or disassemble and inspect the chassis.

I hope my answer is helpful to you, and I wish you good health and a happy mood! <>