Strictly speaking, the timing belt must be replaced for 80,000 kilometers, but do you know why it must be replaced? What kind of damage will it cause to the car if it is not replaced?
First we need to understand: what does the timing belt do? The function of the timing belt is to connect the upper and lower sides. The upper side is connected to the engine camshaft timing wheel, and the lower side is connected to the crankshaft timing wheel. There is a cam on the camshaft. Its contact point is the small rocker arm, and the rocker arm generates pressure through the power brought by the timing belt. , plays the role of jacking up, jacking up the intake valve to allow the atomized gasoline to enter the cylinder block, jacking up the exhaust valve to allow the exhaust gas to be discharged from the cylinder block, when the recessed camshaft contacts the small rocker arm at the same time, the intake air The door and exhaust valve are both closed.
If the timing belt suddenly breaks and the valve is in a jacked state while driving, it will cause the piston to push against the valve and cause serious damage. At this time, the engine needs to be disassembled for maintenance.
If the intake valve and exhaust valve are closed when the belt is broken, then it will be fine.
This statement is not wrong, but when the engine is in a state of several thousand revolutions, the belt suddenly breaks and the valve must be kept in a closed state. This probability is very low, so low that it can be ignored. If your car's valves are still closed after the belt breaks, be lucky and save you thousands of dollars. Therefore, compared with overhauling the engine, it is more cost-effective to replace the timing belt regularly. Generally, the cost of replacing the timing belt for a general model needs about one thousand yuan.
Many friends must say why it is so expensive to replace the belt. Of course, this cost includes not only the belt, but also the tensioner of the belt, the water pump and the labor cost.
Because it is time-consuming to replace the timing belt, usually the repair shop replaces these things together when replacing the belt. If it is not replaced, there will be problems during use, and the maintenance cost will be higher than the price of these accessories.
With the development of the automobile industry, now models are generally changed from timing belts to timing chains.
The benefits of the chain are also very many, its compactness, wear resistance, including maintenance-free, compared to the belt that needs to be replaced regularly, it will make the owner more worry-free. If your car is a timing belt, it is best to check it as soon as possible, so as not to break while driving and cause it to fail to work, not only to overhaul the engine, but also to pay an extra tow fee.
