Choose timing chain or timing belt before you speak.

　 　 [Aika Auto Daily Car Original] 　

　 　 "Our car uses a timing chain, which is safe to use, will not break, and will be maintenance-free for life. Compared with the model using a timing belt, it can save thousands of dollars every 60,000 kilometers. Sir, why don’t you consider it?" After listening to the sales, it is estimated that many people choose cars and go to the timing chain. But is the timing chain really that magical? Let’s look down.

　 　 Before we get to the point, let’s talk about what timing is. Timing is the time when the intake valve and exhaust valve of the engine open. When the intake valve opens, fresh air will enter the cylinder alive, and at this time, the exhaust valve will also discharge the exhaust gas, and the opening time of the intake valve and exhaust valve must coincide to some extent. Only when the whole process is coherent can the engine have good power output, so timing is very important for the engine.

　 　 What can ensure the stable operation of the timing system is what we usually call timing belt and timing chain. They all serve the timing system. Why do you say that the chain is better than the belt? What’s the difference between the two brothers? Let’s talk about the advantages and disadvantages of timing belt and timing chain.

　 　 It’s also true that others say that the timing chain has a strong and durable innate advantage, so you don’t have to worry about it being "in disrepair", and you don’t have to worry about it falling off the chain when you are in a hurry, even if your car is out of warranty in a 4S shop, you don’t have to miss it like a timing belt.

　 　 But the old saying goes well: "Nothing in this world is perfect". Therefore, the timing chain is not good everywhere. When the total mileage of your car reaches 100,000 kilometers, the shortcomings of the timing chain begin to appear. 100,000 kilometers is a hurdle. Before 100,000, it was beautiful, and after 100,000, it was an old lady.

　 　 At this time, the friction between the timing chain and the transmission wheel is getting more and more serious, and you can clearly hear the metal friction sound coming from the engine compartment. If you want to replace the timing chain, the money you saved for 100 thousand kilometers will be wasted, and you have to put some in it.

　 　 So the timing belt will be much more affordable, and the sound of rubber products rubbing against metal is very small. After passing through the sound insulation layer of the engine compartment, the noise can be ignored. Moreover, the friction between rubber products and metal is also small, and the transmission resistance of the belt is small, which can ensure the normal power output and acceleration performance of the engine. It should be noted that we should also take care of our own hands and feet, and bad habits such as frequent rapid acceleration and high-speed gear shifting will affect the service life of the belt.

　 　 The life of the timing belt is limited, and when it is exposed outside the engine, the surface of the belt will age, crack, belt slip and other problems will follow. The aging and fracture of the belt will lead to the engine top valve, and seriously, the valve, piston and crankshaft will be scrapped.

　 　 Editor’s comment:Timing belt and timing chain have their own advantages and disadvantages, depending on how you choose. I think if the timing chain can solve the problem of noise, it is not a bad choice to use the timing chain for ordinary family cars. Isn’t it a good idea to buy a car? What do you think?

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