| 摘要 |
PURPOSE:To optionally arrange an oil cooler further prevent accumulation of air bubbles at filling of cooling water, by providing a cooling water outlet in a position, where the cooling water circulatively flows by a required distance in a cooling water passage in an engine main unit, and communicating the cooling water outlet to a cooling water passage of the oil cooler. CONSTITUTION:Cooling water, forcibly fed through a cooling water pump 4, flows into a cooling water passage 3 in an engine main unit from a cooling water intake port 10. The cooling water is circulated flowing in the cooling water passage 3 by a required distance to a position, at which a cooling water outlet 9 is provided, and the cooling water outlet 9 is connected to an inlet 2a1 of a cooling water passage 2a of an oil cooler 2 through a passage 11. Cooling water, flowing through the cooling water passage 2a of the oil cooler 2, flows in an inlet 4a of the water pump 4 via an outlet 2a2 and passage 12. Accordingly, the oil cooler 2 can be arranged in an optional place except a radiator lower tank 6a, further accumulation of air bubbles can be prevented when the cooling water is filled. |
