Symptoms of abnormal noise in the engine timing chain Description: The possibility of abnormal noise in the engine compartment is more likely. Most people also judge the abnormal noise in the engine compartment based on the source of the sound, which is usually a metal rasping or wind whistling sound. It is mainly caused by excessive wear of some parts or improper assembly and adjustment.


The abnormal noise of the engine timing chain will definitely affect the use. It is recommended to replace it. The reason:

1. The main reasons for the abnormal noise of the timing chain are generally: there is no tension in the chain tensioning device, the timing chain is stretched, the chain guide is abnormally worn, the timing sprocket is abnormal, etc., which involves replacing mechanical parts, which part is broken Which one

2. In order to prevent the gap from increasing due to wear of the chain, the system installs a chain tensioner to automatically tighten the chain. This kind of chain tensioner relies on the oil pressure to work. When the lubrication system fails, the chain gap will be too large and noise will be caused by the abnormal oil pressure. It needs to be checked and repaired in time to prevent the engine from damaging the engine due to excessive gaps. Generally, the noise that occurs due to low oil pressure is greater at idling speed and reduced when refueling;

3. In addition, if the chain is worn and slack, and there is a gap between the meshing parts, the chain will make an abnormal noise during operation. As the chain is worn loose, sprocket teeth are worn, the working surface of the chain tensioner is worn, the plunger push rod is bitten, the oil pressure is low and the lubrication is poor, and the oil passage to the chain tensioner is blocked, etc., will cause the crankshaft chain to be abnormal. ring;

4. At this time, you should disassemble the timing gear cover, check the wear condition of the valley parts and the oil passage and oil pressure of the chain tensioner, replace the parts with more serious wear, and continue to use the ones with lighter wear through repair. After reinstalling the chain, the chain tensioner can automatically adjust the tightness of the chain, generally without manual adjustment;

5. It is recommended to replace the timing belt every 60,000-80,000 kilometers, and the timing chain generally does not need to be replaced unless the timing chain has abnormal noise. The timing chain is not a vulnerable part, but its operation is completely lubricated by engine oil. Therefore, you must pay attention to regular oil replacement and not use inferior engine oil. Under normal circumstances, the abnormal timing chain has been obtained after 50,000-60,000 kilometers. If the car only runs 10,000-20,000 kilometers, it is a quality problem. It is recommended to apply for a claim as soon as possible.

What needs to be reminded is that if it is an abnormal noise in the engine, most of the car owners cannot solve it by themselves, and it is best to send it to the factory for inspection.