Super Car Sales System

Chapter 197 Antifreeze

Chapter 196: Antifreeze

Ordinary maintenance is too simple and easy for Fang Yuan, who now has the basic maintenance skills of used cars.

Fang Yuan didn't even want to tell Zhou Hongbo directly that the small insurance is to change the engine oil and oil filter, and the big insurance is to add the air filter, air conditioning filter, fuel filter, spark plug, brake fluid, transmission oil, power steering oil, spark plug, etc. .

So many maintenance items do not need to be replaced every time. You don’t need to listen to what others say about the specific maintenance items and the replacement cycle, and you don’t need to ask others. The most accurate and authoritative maintenance cycle refers to the requirements in the car maintenance manual. .

Except for rotary engines and F1 racing cars, ordinary cars are not so delicate. Excessive maintenance is a waste of money, and neglect of maintenance will damage the car. At most, the maintenance cycle will be shortened after the car ages.

After Fang Yuan explained in detail how many types of spark plugs there are, how to look at the grade of engine oil, how many types of brake fluid, and how to change the engine oil, etc., he finally emphasized that he must pay attention to not being careless when changing antifreeze...

When Fang Yuan was explaining, Zhou Hongbo kept nodding his head. He felt that Fang Yuan's explanation was very detailed. At the same time, he felt that Zhenghong Motors had a professional store manager like Fang Yuan, and his strength must be very strong, otherwise such an excellent talent would not be able to be retained at all. , but felt that Fang Yuan deliberately emphasized the inconspicuous detail of antifreeze at the end, and asked curiously: "Isn't it just antifreeze? Our big city is not cold, what should we pay attention to?"

"Antifreeze should actually be called coolant. Its biggest role is not to prevent freezing in winter, but to dissipate heat from the engine at ordinary times."

Antifreeze plays a role in helping the engine dissipate heat and protecting the engine by circulating in the engine water channel and cooling water tank.

The reason why it is called antifreeze is because the antifreeze effect is particularly significant in winter. People remember this effect, and it is commonly called "antifreeze".

The consequences of lack of antifreeze are sometimes more serious than engine oil burning. The situation of high water temperature and no warm air is still mild, and the serious one is that the engine may scuff due to poor heat dissipation.

Fang Yuan took the Tianhong second-hand car market as an example. For example, ordinary car dealers dare to buy oil-burning BMWs, Audis, and Mercedes-Benz. Don't think about selling it smoothly and making more money.

"I thought the antifreeze was only used to prevent freezing in winter." Zhou Hongbo smiled wryly, "When I was a child, I saw my father doing maintenance on the car at work, and it seemed to be water added directly."

"As I said just now, antifreeze has antifreeze and anti-boiling functions. Generally, the freezing point can reach about minus 40 degrees Celsius, and the boiling point can reach about 130 degrees Celsius. In addition, it also has the functions of anti-corrosion and anti-scaling. Let alone use fake antifreeze. And water, even other brands of antifreeze, which is why there are so many colors of antifreeze.”

Fang Yuan explained seriously that the antifreeze must be of the same brand. If it is used indiscriminately, the inner surface of the engine cylinder will be corroded and pitted.

"So serious?" Tong Lei and Zhou Hongbo exclaimed at the same time.

Especially Zhou Hongbo, who was indifferent just now, felt a little bit in his heart, secretly glad that he met Fang Yuan today.

Neither Zhou Hongbo nor Tong Lei thought that the cooling fluid, which they usually didn't pay much attention to, was so important. The two of them unanimously asked Fang Yuan to explain it in detail.

Fang Yuan, who had already stopped explaining, had to explain in detail that the replacement cycle of coolant is generally two to three years or [-] to [-] kilometers for different brands and models.

In the process of driving, you should always pay attention to the lack of fluid.

Most models now have a coolant level sensor, if too much is missing, the engine will light up a fault light to remind the owner.

It doesn't matter if your car doesn't have a coolant level sensor, just check the car more often and pay more attention.

In the process of self-independent inspection, you need to pay attention to two points.

The first is the coolant level.

It is very simple to check the liquid level. Generally, the upper and lower limits of the liquid level are marked on the coolant kettle, as long as the liquid level is between the upper and lower limits.

Another point to check is the freezing point of the coolant, which is the temperature at which the coolant freezes.

Dahai City is located in the southwestern border of China, so there is almost no trouble in winter, but in the northeast and northwest, antifreeze is very important.

Just like in winter, if the water pipes outside the Northeast are not protected, they may even be frozen and fried. These problems will also be encountered with precision instrument engines.

If the coolant freezes inside the engine in winter, it could damage the water tank, water pipes, and even the engine block.

As the coolant is used for a long time, the alcohols in it may gradually volatilize, and finally affect the freezing point and boiling point.

Therefore, in areas with low temperature in winter, the freezing point of the coolant must be checked to ensure that its freezing point is low enough that it will not be frozen in winter.

Checking the freezing point of the coolant requires a freezing point gauge, which is generally available in repair shops.

You only need to suck a little coolant from the kettle, drop it on it, and look at it against the light. The blue-white dividing line corresponds to the freezing point of the coolant.

If it is found that the freezing point of the coolant is too high, it needs to be replaced.

As for the replacement, it is very simple. Many models will have recommended original antifreeze. If conditions permit, just choose the brand recommended by the original factory.

If there is no brand recommended by the original factory, then buy a brand that is as reliable as possible, and it is best to use the same coolant as the original car, because the components of coolants of different brands are also different, try not to mix coolants, just in case What kind of chemical reaction happened to the two coolants and blocked the engine water channel, that would be troublesome.

Before adding antifreeze to the kettle, first look at the precautions marked on the bottle.

For example, BMW’s original antifreeze says that it is recommended to mix it with water one-to-one. After mixing, the freezing point is -40°C. If you want a lower freezing point, you can add less water and add more stock solution.

Of course, it is also possible to just add the stock solution, but such a low freezing point is a waste of money, not to mention that it is useless in the south of China, even in the whole of China, unless you want to drive to the North Pole or Antarctica.

In addition, there is also a kind of waterless coolant. First of all, some brands of waterless coolant are really expensive, and it may cost thousands of dollars to replace it. Although it is free to replace for a lifetime, it is not worth it.

Secondly, water cannot be added to the anhydrous coolant. Adding water may cause engine failure. It would be embarrassing if there is an emergency on the way.

"Emergency?" Tong Lei asked curiously, "What if this kind of situation really happens and there is no antifreeze?"

"If it is an ordinary coolant, it is also possible to add water temporarily." But Fang Yuan warned Tong Lei that if you don't have antifreeze on hand, you can add a little water, but the water you add must be distilled or pure water. Do not add tap water.

Even antifreeze mixed with tap water can cause the waterway to rust, and there is a risk of scale clogging the waterway. At that time, stones will form in the waterway, just like people get sick.

(End of this chapter)