| 摘要 |
PURPOSE: A cooling apparatus of an engine is provided to buffer coolant in the water pump by easily discharging bubbles from the engine in charging coolant at the initial stage, and to improve the cooling efficiency of the engine by actively flowing coolant. CONSTITUTION: An air vent hose(61) is connected to a water pump(59) and a portion placed higher than the water level of coolant of the water pump among the other cooling circuit excluding the water pump to discharge bubbles from the water pump. The air vent hose is placed higher than a coolant passage(57) connecting the water pump to a coolant thermostat(51). A hole is formed in a volute portion of the water pump to discharge bubbles, and a bubble discharge nipple(63) is installed in the hole. The end of the air vent hose is fixed and inserted to the bubble discharge nipple.
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