COOLANT CIRCULATION SYSTEM

摘要

A coolant circulation system is provided to firmly fix a surge tank onto a vehicle body and to prevent a leakage of coolant by preventing the coolant from contacting a joint portion in the surge tank. A coolant circulation system includes an engine(1); a radiator(3) for cooling the coolant heated by the engine; a surge tank(20) which has an upper limit line(24) serving as a maximum level for accommodating the coolant and discharges air contained in the coolant; an engine vent line for interconnecting the surge tank and the engine; and a radiator vent line(40) for interconnecting the surge tank and the radiator. The radiator vent line is connected to the surge tank through pressure caps(50) above the upper limit line.