Does the timing chain need to be replaced?

[LeGrant]

The timing chain needs to be replaced, but not on a regular basis. The timing chain is lubricated by engine oil. If the engine oil is not changed for a long time or the oil quality is poor, it can easily increase the friction between the timing chain and the sprocket, which will reduce the lifespan of the timing chain. However, even when the timing chain reaches the end of its lifespan, it won't break immediately but will gradually stretch. The consequence of stretching could be valve interference, leading to unstable engine operation and poor acceleration, or it might skip teeth, causing engine failure. Generally, it's recommended to inspect the timing chain after about seven to eight years of driving or around 100,000 kilometers, while the replacement cycle is typically around 150,000 to 200,000 kilometers.