2. If the pump is damaged, it should be repaired or replaced. Checking the pump operation without removing it from the engine can be done in three ways.
3. With the engine running and warmed up to normal temperature, pinch the upper radiator hose with your hand. If the pump is working properly, you will feel resistance created by the coolant pressure.
Caution: Keep your hands out of reach of the fan blades.
4. There are ventilation holes on the pump body. If the pump seals are damaged, coolant will leak through it. In most cases, you will need a mirror and a light to detect this hole and leaks through it.
5. If the pump bearings are damaged, you can hear a characteristic noise. If the pulley shaft moves up and down, the shaft is worn. Do not confuse the sounds from the bearings and the belt slipping.
Material obtained from the website: HONDABOOK.ru