If there is a problem with the timing chain, most of them will basically have precursors, for example, the engine will make a noise. In addition, the timing chain failure problem can also affect the increase in fuel consumption of the vehicle, difficulty in starting the vehicle, weak acceleration, slow response, and serious exhaust emissions.

The timing chain is lubricated by lubricating oil. If the engine lubricating oil is not changed for a long time or the quality of the oil is not good, it will easily increase the friction between the timing chain and the sprocket and shorten the life of the timing chain. If the abrasion is serious, the timing chain is prone to malfunction or damage, and it will be gradually elongated, and the elongated may appear to jump out of the teeth, causing engine failure.

If the timing chain jumps gears, the vehicle will come out and feel weak. If the tooth jump is severe, the engine will tremble and vibrate, which may also cause difficulty in starting the vehicle, and even damage the valve. If you want to check whether the timing chain is stretched, you can use a spring balance to check the elongation of the chain at three or more places. If it exceeds the used length, it should be replaced immediately; a more professional approach is to go to the 4S shop to read it. Check the crankshaft sensor and camshaft sensor. If there is an alarm for rotation delay, there may be a hidden danger of chain elongation, and it should be repaired or replaced immediately.