I believe everyone is familiar with timing belts, but there is also a small group of people who do not know, or even know whether their car is equipped with iron chains or rubber belts.

The timing belt is a key component of the engine valve system software and is a transmission system component. The effect of the timing belt is also based on the connection with the transmission shaft and a certain reduction ratio to ensure the accuracy of the intake and exhaust pipe time. When the engine is running, the timing belt can maintain synchronous operation of the piston rod stroke arrangement, valve opening and closing, and ignition time at all times.

Many car buyers usually do not pay attention to the use of the timing belt. Once a common malfunction occurs in the timing belt, the timing switch of the valve will cause deviation, endangering engine performance, and the car will experience conditions such as weak acceleration, idle shaking, vibration, and stalling. If the timing belt ages and ruptures, the valves and ignition device will stop running, and the car will not be able to operate normally. There may be a situation where it cannot start, and in more serious cases, it may even push the valves and damage the engine.

Car owners of the timing belt have all looked over, standing in the front row of the French car series, because the probability of you winning is 100%, such as Citroen Elysee, logos 207, 307, etc. The timing belt does not change for 60000 kilometers, and 90% will weld you on the road.

Other car series owners, don't take chances either. Although the average lifespan of your timing belt is 100000 kilometers, it is also related to maintenance and driving habits. Rough driving will definitely cause the belt to break prematurely.

So how do you determine whether your car's timing belt should be replaced or not? It's easy, you just need to remove the timing belt cover and take a look!

Don't hesitate anymore like this. The editor tells you that if it breaks on the highway, the valve top will break, and the towing and repair costs for a regular car will be over 6000 yuan. However, you have only replaced it for over 1000 yuan now.

The editor was not sent by the repair shop. Do you know the result after piercing? Make you shiver as you watch! Without further ado, continue to look at the following picture.

Now comrades all know what's going on, right? Finally, to summarize the automotive repair case:

① 80000 kilometers, if the formal belt cover is difficult to disassemble and inspect, it can be replaced directly to prevent future problems;

② Although it is less than 80000 kilometers, if any formal belt cracks or drops are seen during maintenance of other projects, they will be replaced.

Finally, let's popularize some professional knowledge in this area

1. Timing system

The normal operation of the engine depends on the precise time coordination between various components, such as the opening and closing time of each valve and the ignition time of the spark plug, which is guaranteed by the engine's timing system. ​

The timing system is actually very simple. In a four stroke engine, the crankshaft completes a complete cylinder cycle every 2 revolutions. Therefore, the most basic timing system is to have a gear on the camshaft that drives the valves and a gear ratio of 2:1 on the crankshaft. In this way, the two are connected by some mechanical means. After the crankshaft rotates twice, the camshaft will rotate once, and each valve will act exactly once.

2. Synchronous transmission

In order to open or close the engine intake and exhaust valves at the appropriate time to ensure that the engine cylinders can intake and exhaust normally, modern engine camshafts and crankshafts must achieve reliable synchronous transmission. Currently, two types of synchronous transmission are used: timing belt and timing chain.

3. Timing belt

Made of rubber, it has low noise, low transmission resistance, and low transmission inertia, which can improve the power and acceleration performance of the engine at a lower cost. But it is very complex to replace, with many parts disassembled and high maintenance costs. Moreover, once the timing belt jumps teeth, there will be phenomena such as unstable idle and poor acceleration. If a fracture occurs, it can cause serious consequences such as sudden engine stalling, steering or braking failure, and engine scrapping. ​

4. Timing chain

Made of high-strength steel, its advantages include long service life, low failure rate, and the ability to prevent the car from breaking down even if it malfunctions. But the chain rotation noise is high, the transmission resistance is high, and the transmission inertia is also high, which to some extent increases fuel consumption and reduces performance.

5. Replacement of timing belt

The timing belt is a consumable item, and any rubber component will age. The aging situation varies depending on the usage environment. Generally, the usage time is mostly 3-4 years, and there are also those that last for 10 years or longer. The mileage can be used as a reference value to measure the wear condition. The general regulations range from 60000 kilometers to 150000 kilometers. The replacement cycle varies for different vehicle models, and specific reference should be made to the vehicle maintenance manual. Usually, car owners can also pay more attention. If there is a malfunction in the timing belt, it is easy to make different sharp noises with different speeds

6. It is advisable to replace it early rather than late

If the timing belt is replaced too frequently, it can also lead to unnecessary waste. But overall, it's better to be early than late. Some people say that early replacement is like buying insurance, seeking peace of mind. Some people also say that regretting for waste is much better than regretting not for it. After all, once suddenly broken, not only can the engine be damaged, but it may also pose a threat to personal safety. Even if there is a spare belt in the car, due to the tedious process of replacing it, most car owners cannot handle it immediately.

7. If you want to replace it, replace it with high-quality genuine products

If you want to replace it, replace it with a high-quality genuine product, as it is an important component that affects the intake and exhaust of the engine. Because replacing it requires dismantling many parts, it is not very convenient to check the timing belt. Moreover, compared to the cost of parts, labor costs account for a large proportion of maintenance costs. A car owner shared that an experienced repairman usually takes 1 hour, while a 4S dealership usually takes up to 2 hours. He personally replaced it and used it for 5 hours. Because a replacement requires a major disassembly, when replacing the timing belt, other components such as the belt tensioner, idler, and water pump are usually replaced at the same time.

That's all for today's knowledge about timing belts. Some people also say that with the advancement of technology, continuously improving timing chains will replace timing belts. Will there be a day when the timing belt will disappear? Only time will know the answer! What do you think?

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