Causes of water pump noise

The loud noise of the water pump may be due to the following reasons:
1. The impact of the rotary vane on the cylinder, the residual volume of the water pump and the sound of the pressure oil in the exhaust dead gap;
2. The impact of the exhaust valve plate on the valve seat and supporting parts;
3. Echo and bubble bursting sound inside the box;
4. Bearing noise;
5. Noise caused by a large amount of gas and oil impacting the oil baffle;
6. Others. Such as noise caused by transmission, fan noise of air-cooled water pump, etc.
7. Motor noise, this is a crucial factor.