Этот шланг? Из американского мануала. там я ничего не понял
1.Drain the water from the radiator, heater core and engine after
unplugging the radiator drain plug and removing the radiator cap.
2.Remove the water feed hose B, and drain the coolant in the water jacket.
3.Remove the radiator condenser tank assembly and drain the coolant.
4.Drain the coolant then clean the path of the coolant by injecting
water into the radiator from the radiator cap area.
5.Install the water feed hose B.
6.Securely tighten the radiator drain plug.
7.Assemble the radiator condenser tank assembly.