Importance

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Abstract

A cooling structure of a multi-cylinder engine is provided, which includes a first water jacket formed in a cylinder block to surround cylinder bores of cylinders arranged inline, a spacer having a vertical wall surface and inserted into the first jacket, and a coolant inlet formed in the first jacket on a first end side in a cylinder line-up direction. The structure circulates coolant introduced from the inlet to the first jacket and a second water jacket formed in a cylinder head coupled to the cylinder block via a gasket. The spacer has a flow dividing rib extending outwardly from the vertical wall surface and for vertically dividing the coolant flow, introduced from the inlet to an intake- or exhaust-side section of the first jacket, toward the second jacket through a communication hole formed in the gasket and toward a discharging section provided to the cylinder block.

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First Claim