Why does the belt make an abnormal noise when starting a cold car?

The sound of the timing belt rubbing against the timing cover. Such problems can damage the timing belt in advance. If it breaks, it will damage the engine valve and require servicing. The water pump makes an abnormal noise. But most of them happen when the car is hot. If the noise is not loud, you can ignore it and replace the alternator belt or alternator tensioner as well as change the timing at 9 weeks/6 years. As long as the sound is not loud, you can ignore it. Will not affect the life of the belt. Even if it breaks, you can replace it immediately before the battery runs out. Generally there will be no loss of other components. Even if the power steering pump is disconnected, it will not work. How to confirm if the generator belt is making abnormal noise: pour water on the generator belt beforet start, turn on and the chirping disappears. After the water dries for 1 or 2 minutes, the chirping will reappear. Pour a little more water and the noise disappears again.