How often should the engine's timing belt be replaced?

[BrandonFitz]

The engine's timing belt should be replaced every 3 to 5 years or 80,000 to 100,000 kilometers. The functions of the timing belt are: 1. To drive the engine's valve train; 2. To ensure the engine's intake and exhaust valves open and close at the appropriate times; 3. To guarantee the engine cylinders can properly intake and exhaust air. The functions of the engine are: 1. To generate power by fully burning the fuel delivered into the cylinders; 2. To determine the vehicle's power, fuel efficiency, stability, and environmental performance. Engine maintenance methods include: 1. Using qualified engine oil; 2. Using qualified coolant and antifreeze; 3. Regularly cleaning the radiator scale; 4. Periodically removing engine carbon deposits; 5. Regularly replacing the car's three filters; 6. Maintaining a reasonable engine speed.