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[Excellent point]
In addition to antifreeze, antifreeze also has the following advantages:
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(1) anti-corrosion]
The engine and its cooling system is made of metal, copper, iron, aluminum, steel, there are solder.
These metals in contact with water at high temperatures, a long time will be met with corrosion and rust.
Antifreeze is not only not the engine cooling system caused by corrosion, corrosion and rust.
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(2) high boiling point]
The boiling point of water is 100 ° C, high-quality antifreeze coolant boiling point is usually zero in on the 110 ° C, so that in the summer, antifreeze coolant harder than water boil.
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(3) anti-fouling
Water as coolant most drivers a headache is the scale, the scale attached to the tank, the metal surface of the water jacket, the cooling effect is getting worse, and it is very difficult to clear.
Quality antifreeze with distilled water manufacturing, plus anti-scaling additives, not only the raw scale descaling function.
Of course, if you scale the tank is very thick, is best to use tank cleaning agents thoroughly cleaned and then add the antifreeze.
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[Selected with
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[Antifreeze effects]
The freezing point of water is 0 ° C, the general type of antifreeze can reach -40 ° C, high-quality antifreeze should be able to reach about -60 ℃, which is an important indicator of the calibration antifreeze quality;
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Boiling Point
The boiling point of water is 100 ° C, and antifreeze should be at least above 108 ℃, which means that more low freezing point, boiling point, the higher the greater the temperature difference which, relatively speaking, the quality of antifreeze, the better.
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[For use]
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[Cooling]
Cooling is the fundamental role of the coolant. Engine work, a lot of heat, of which 60% of heat should be circulated through the cooling system into the surrounding space.
The low boiling point of water and methanol coolant easy to boiling, if the vehicle is the coolant boiling under the conditions of work, even in a very short period of time can also cause engine damage and even paralysis.
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[Preservatives]
Cooling system radiator, water pump, cylinder block and cylinder heads, pipes and other components from steel, cast iron, brass, copper, aluminum, welding solder and other metal components, the electrode potential of the different metals in the electrolyte likely to occur under the action of electrochemical corrosion;
Binary alcohols in the coolant acidic decomposition product of fuel combustion underwent acidic exhaust gas may penetrate into the cooling system, and promote the corrosion of the cooling system.
The cooling system corrosion make the radiator tank into the water chamber, injector sleeve, cooling pipes, fittings and the water tank pipe failure, corrosion products Messe pipe, causing the engine to overheat and even paralysis;
Corrosion perforation, the cooling fluid to penetrate the combustion chamber or crankcase will have severe damage, because when the coolant or water and considerate oil mixed to produce oil and glial weaken lubrication, making the valve, hydraulic valve push rod and piston rings bond . Thus cooling the solution by adding a certain amount of anti-corrosion additives to prevent the cooling system corrosion.
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[Anti-fouling]
The scale in the cooling system from the water, calcium and magnesium cations, alkaline earth metal cations in the heat load conditions, easy to build scale with the lead ion in water reaction.
The scale can wear the pump seal and cover the outer wall of the cylinder block water jacket, so that the thermal conductivity decreased, and the cylinder head hot zone temperature surge, causing the cylinder crack. Therefore, in order to reduce the scale of production, the coolant in the production and filling process requires the use of deionized water after softening treatment.
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[Antifreeze]
Low winter temperatures, the car could continue to use low temperature in winter, the engine coolant added to reduce the water freezing substances as antifreeze, keep the cooling system does not freeze in cold weather. It is sometimes the coolant is called "antifreeze or antifreeze.
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[Use]
1: to make use of the same brand of antifreeze
Different brands of antifreeze production formula will differ if the mix is ??likely to be a chemical reaction between a variety of additives, resulting in additive failure;
2: the antifreeze valid for two years (the president of the individual products), should confirm the product is valid;
3: must be changed regularly, generally replaced every two years or 40,000 km per vehicle, a taxi should be replaced to get ground.
Replacement should put the net old liquid cooling system cleaned, then replaced with a new solution;
4: avoid Duishui use.
Non-traditional models antifreeze can not be watered down, so will generate precipitation, seriously affecting the normal function of the antifreeze.
Models of antifreeze can be watered, but not against too much water.
5, due to the antifreeze from the mother liquor and soft water, the mother liquor types such as tetrol.
Ethanol, ethylene glycol, glycerol, water softener-free or with a small amount of calcium and magnesium ions in water such as distilled water, unpolluted rain, snow, and so on.
The use of antifreeze in winter, the need to improve the proportion of antifreeze the midline liquid filling.
But preferably not more than 60%, after all, the increase of the mother liquor will reduce the engine's cooling effect.
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[More change]
Under normal circumstances, the car driving from 3 000 to 4 000 km will need to replace the antifreeze. Replace the antifreeze as follows:
Wring the water cover, open water tank release valve to release antifreeze.
(2) will be a connection to water pipe rubber tube is inserted into the tank with the outlet, open the tap water continuously flowing through the engine cooling system.
Flushing operation, make the engine idle to maintain this operation, until the tank to release water so far.
(3) Close the tap water system to be cooled is exhausted, then close the release valve on the tank.
4 from the tank with outlet added antifreeze, antifreeze filled with water tank. Unscrew the tank cap, added antifreeze to "Max" scale line, careful not to exceed the "Max" scale line.
(5) Replace the tank cover and tank cover, and tighten.
Start the engine idle for 3 min, to wring the water cover.
When the cooling system due to exclude part of the air, antifreeze surface will reduce this time to add antifreeze, the antifreeze the "Max" scale line is reached.
7 cover the radiator cap.
Note:
Open the radiator cap, pay attention to the antifreeze in the state of the cooling tank to observe whether there are impurities in the final surface to cover the tank after the end of the "MAX" and "MIN" tighten.
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【Article is excerpted from: Baidu Encyclopedia】
【Network reprint / Just reference】
【Translation is by Goolge】
