What are the precursors to timing chain problems?

[WalterFitz]

Here are the precursors to timing chain failure: 1. Abnormal noises. While driving, if you hear occasional "clicking" friction sounds from the engine or notice a significant change in the usual engine noise, it indicates a timing chain issue, and prompt inspection and replacement are recommended. 2. Increased fuel consumption. After driving a certain mileage, the car may experience varying degrees of increased fuel consumption, which could be caused by timing chain failure. 3. Reduced power output. A decrease in the car's power output is largely due to the engine and related component configurations. Once the timing chain fails, it can restrict cylinder movement and affect the intake and exhaust functions.