| 摘要 |
In one embodiment of the present invention, a cooling water path that extends in the direction of a row of cylinders is provided between left and right banks. A communication port that communicates with a discharge port of the water pump is provided at a position on the front side between the left and right banks in the direction of the row of cylinders, and first to third and fourth to sixth introduction ports that introduce cooling water to a water jacket of the left and right banks of the cylinder block from the rear side in the direction of the row of cylinders, are formed in the cooling water path. Also, among first to fourth outlet ports 31a to 31d of a cylinder gasket 3R that correspond to each cylinder, a second outlet port 31b that is second from the front side in the direction of the row of cylinders and corresponds to a third and fourth cylinder #3 and #4 is formed with a large opening area such that an outflow volume of cooling water to left and right cylinder heads is greater for the second outlet port 31b than for third and fourth outlet ports 31c and 31d that are further to the rear in the direction of the row of cylinders and correspond to fifth to eighth cylinders #5 to #8.
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