In recent years, with the continuous update and upgrading of automotive industry technology，Many auto manufacturers have launched many "maintenance -free" car parts，So is these "maintenance -free" automobile parts really "maintenance"? Let's take a look at together。Welcome to watch the seventeenth issue of "Extreme Car" by Tencent Automobile and Lao Shan car。

At present, the wide "maintenance" parts circulating on the market in China，Mainly there is a gearbox、Time Chain，Another one is not an original manual instructions，But recently has a widely popular water -free cooling fluid in the market。

Let's go from the big piece firstseabet appSpeaking，At present, the three major gearboxes in the market are AT gearbox、Dual -clutch gearbox and CVT gearbox，A few typical examples here: ZF 6AT gearbox、Volkswagen's dry dual -clutch transmission、There is also a CVT gearbox universal Japanese car。

According to the technical requirements of the manufacturer，These are all lifelong maintenance，But finally according to the actual feedback of the market，These gearboxes are finally not maintained in time，caused premature wear，In the end, you need to replace the whole machine。

At this time, many people have doubts，Is the manufacturer who mislead us? In fact, not，This involves the main reason.

One of the reasons is that automakers did not fully understand the domestic car environment and road conditions at first，According to your own domestic car environment and road conditions, the entire domestic car manual translation is translated。And our current car manuals are all required to replace the transmission oil regularly。

Second, let's talk aboutFree maintenance timing chain，This chain is more targeted，Mercedes -Benz's 272、274、276，BMW's N series engine is indeed exempt。

But the EA888 first -generation machine and the second -generation aircraft are not maintenance，Although the highlight of this engine at that time was the maintenance time chain，But due to the tightness and chain stretch of the positive chain of the engine，As a result of many engines of the engine，Eventually leading to the engine of the engine。

Finally, let's talk about it in recent years.Water -free coolant, which is commonly known asAnti -frozen liquid，Talking about this, we must first understand the main role and operation of the antifreeze。

Anti -frozen solution is mainly used to cool seabet loginthe engine，Relying on the pump to drive the anti -freezing solution when the engine work is working，Make the antifreeze flowing in the engine，Therefore, to ensure the normal operating temperature of the engine for the engine heat dissipation。

The promotion of water -free coolant is lifelong maintenance，Relatively speaking, the use and addition of coolant are also quite harsh。

From the perspective of adding，It needs to completely empty the previous coolant，But ordinary coolant is impossible to empty the previous coolant;

From the perspective of use，The pumps of all engines have a fixed life，Water -free coolant concentration is higher than ordinary coolant，will increase the load of the pump，Causes advance wear of the pump。

So the so -called exemption，Actually, there is no maintenance to save money for owners，Instead of saving the loss together，Finally spending money and spend a lot of money。

What must be emphasized here is，The so -called exemption is not really completely exempt，It's just a longer -lasting cycle for maintenance，The life of the product itself and longer the need to be maintained。

Finally, talk about a more funny point，Many components that need to be maintained regularly，For example, spark plug、brake oil, etc.，However, some domestic riders are used as "maintenance" parts，What do you think of this?