This is the fourth article in our "Before Knowing Cars in Winter" series. Today we will talk about some "pits" that we often encounter during winter maintenance, so that everyone can clearly use their cars without spending money. 1. Do you need to change to "low-temperature antif

This is the fourth article in our "Before Knowing Cars in Winter" series. Today we will talk about some "pits" that we often encounter during winter maintenance, so that everyone can clearly use the car without spending money.

1. Do you need to change to "low-temperature antifreeze" when winter begins?

Some people say that after winter enters, "low-temperature antifreeze" should be replaced, otherwise antifreeze freeze will directly lead to the engine scrapping.

Actually, I tell you that the antifreeze added to you by the original factory can ensure that you will be wandering around the country without any problems. Because the cars produced by the manufacturer are sold nationwide, and it does not stipulate that you cannot drive around after buying the car, so the original antifreeze can at least ensure that there is no icy anywhere in China.

Moreover, "not freezing" is just the most basic "conformity" of antifreeze and is the easiest effect to achieve. In addition, antifreeze also has stability and corrosion resistance. These are the most important and cost-effective things for an antifreeze. The original antifreeze is almost better in this regard than what you change yourself.

So unless you want to transport your car to the North and South Poles for use, you don’t need to worry about freezing and change the antifreeze.

2. If you can’t get a car, the battery will break down. If you change it,

. In what season does the battery sell the most in the car quick repair shop? It must be winter! Because it is most likely that you can't get a taxi in winter. Many car owners immediately change the battery when they see that they can't fire. In fact, there are many batteries here that can actually be "rescued".

We need to figure out this logic: some cars cannot catch fire, which means that the battery is really not good. is severely aging, and the temperature in summer and autumn is relatively high, so it can barely maintain it. After entering winter, he could not withstand the test of low temperatures and directly "subjugated his gun".

However, some cars have batteries that are still very healthy, but various reasons cause their reserve power to be insufficient. The low temperature in winter leads to a shrinking capacity. In addition, the engine starter is large, and the starter needs to consume more power. As a result, the battery cannot bear it and will not be able to drive it. At this time, you just need to recharge the battery and it will be "resurrected with full blood".

So if your battery is not in operation after only two or three years of use, don't give up on it, because lead-acid battery is actually very tenacious. As long as there is no problem with the product quality, it is not until two or three years to retire. You can charge it at this time and charge the voltage to above 12.6 volts. After the test, consider whether to replace it or not.

3. Idle jitter and difficulty in starting. If you are a big problem, you can fix it.

Many cars are prone to idle jitter and difficulty in starting when winter comes. When some car owners go to repair the car, they clean the carbon deposits and throttle valve , and intake manifold or three-way catalytic . The problem still cannot be solved after one operation. Then he caught various parts and replaced them all, and the problem may have been cured in the end, but the money spent a little more, which made him feel like "cannons hitting mosquitoes".

In fact, everything is normal in the warm weather of your car. The unstable idle speed or difficulty in starting after cooling may be related to the aging of spark plug . Especially if your car hasn't changed the spark plug for a long time, it is certain that more than 90% of the possible relationship is related to the spark plug.

Because we need to be clear about this basic common sense: the spark plug can only ignite the mixture, and cannot ignite the liquid gasoline. After gasoline enters the cylinder, it must evaporate into combustible gas, then mix it evenly with the air and reach a certain concentration so that the spark plug can ignite. Moreover, spark plug ignition is not like a bomb explosion. An arc can instantly ignite all the mixture. Instead, it first ignites the mixture near the arc to form a very small ignition core. This ignition core then ignites other mixtures. This process is actually quite difficult. Because sometimes the intake air flow is too strong, the air flow in the cylinder moves very violently, and the fire core is easily blown out by the airflow, resulting in ignition failure.

Especially in winter, the temperature is very low and the gasoline is poor, so the computer will control more fuel injection during cold start. This will definitely make the surface of the spark plug more wet. If the spark plug ages severely, there may be a slight short circuit at this time, resulting in a decrease in arc energy and even an arc cannot be generated. Moreover, even if an aging spark plug is barely generated, the energy is too weak, so the fire core produced is very small, and the temperature in the cylinder is low and the mixed air quality is poor, making it more difficult for the fire core to ignite other mixed air. At this time, it is easy to jitter and start up.

So when you encounter idle jitter, startup difficulties, and you haven't changed the spark plug for a long time, try changing it to see the effect. There is no need to change it too well, the original factory level is enough.

4. On snowy days, you need to change to snow tires , which is safer

a few days ago. We got on the Xiaoxue here. My friend came to me and said he wanted to change to a snow tire. I said, "How many snow can we have in winter? Do you change the snow tires for two days before changing them? Are you doing tire evaluation?" He said that the car repairer said that snow tires can run on the asphalt road. I asked him, "You have run for a while and you have worn out the anti-slip patterns on the tires. What will you do next winter? Change to a new one?" He said nothing.

So in terms of safety, the safety improvement brought by snow tires is definitely higher than that of any four-wheel drive system, but we must consider whether snow is often accumulated on your local roads. If not, then there is no need to spend this money to replace the snow tires. Maybe your tires are not replaced well and the snow melts. It’s better to buy a set of anti-slip chain if you have this skill.

5. In winter, you need to change to low viscosity engine oil

Use high viscosity engine oil in summer and low viscosity engine oil in winter. This is probably what many car owners have heard of. But this is not the case.

We need to know that there are two viscosity of engine oil, one is low-temperature viscosity and the other is high-temperature viscosity. For example, the engine oil of 5W30 means suitable for winter use, the numbers in front of W represent low temperature viscosity, and the numbers in the back represent high temperature viscosity.

Low temperature viscosity affects cold start performance and lubricating performance after cold start. For example, in the morning, the temperature of minus 5 degrees Celsius, the oil of 0W30 is definitely better fluid than that of 5W30, and the resistance is less when starting, and it can reach the lubricating part faster after starting.

High temperature viscosity mainly provides lubricating performance after the engine reaches normal working temperature. , such as 0W20 engine oil and 5W30 engine oil, the latter has higher viscosity when the engine works normally, the oil film is thicker, and the protection effect is better.

Since the temperature changes with the season, in winter, if you want to reduce the starting resistance and provide better cold start lubrication performance, you can choose engine oil with lower viscosity at low temperatures. However, the engine operating temperature will not change much all year round, so there is no need to change the high temperature viscosity. For example, if you use 5W30 engine oil in summer, you can choose 0W30 in winter, but there is no need to choose 0W20. And be sure to pay attention to the oil model when choosing it, be sure to refer to the user manual and flexibly adjust it within the scope recommended by the manufacturer.

or above are the winter maintenance problems I have encountered. I hope it will be helpful to everyone. I also welcome you to share your valuable experience in winter car use.