[Translation from Japanese to English ] And the initial cause that the two way valve got broken was that the two way ...

Original text

そして、two way valveが破損した最初の原因は、cooling water temperature at out let of the pumpが一定にならない為、two way valveが常に長時間on-offの状態にあった可能性が高いです。

Translation / English

And the initial cause that the two way valve got broken was that the two way valve probably had been on and off for a long time because cooling water temperature at out let of the pump was not constant.

Translation / English

In addition, it is highly likely that initial cause of breaking two way valve is the two way valve had been on and off for a long time all the time since cooling water temperature at out let of the pump had not been stable.

Translation / English

Then the first cause of the damage to the two way valve was most likely that the cooling water temperature at the outlet of the pump was not constant, so the two way valve was always on and off for a long time.