Device for cooling a vehicle engine, comprising: a
combustion chamber in which a
piston moves back and forth; Water jackets (16a, 16b) through which a
coolant flows to cool the
combustion chamber; and a
cylinder block (1) which forms a frame of the vehicle engine, wherein the
cylinder block (1) comprises: a
cylinder block body (10) in which the
combustion chamber is formed, and an
exhaust gas recirculation (EGR) cooler (30) which is mounted in the cylinder block body (10) in such a way that the EGR cooler (30) exchanges heat with a
coolant discharged from the
combustion chamber, wherein the cylinder block body (10) is provided with an EGR cooler
insertion section (20) to which a
coolant from the
combustion chamber is supplied and in which the EGR cooler (30) is inserted, wherein the EGR cooler (30) is provided with a gas
pipe (36) in which an
exhaust gas flows, wherein the
exhaust gas of the gas
pipe (36) is cooled by a coolant which is supplied to the EGR cooler
insertion section (20), wherein a supply opening (12) is configured to supply a coolant to the EGR cooler
insertion section (20) in which cylinder block body (10) is formed, wherein the cylinder block body (10) has a plurality of cylinder chambers (18), wherein the water jackets (16a, 16b) have a circulation flow channel (16b) configured to exchange heat with all cylinder chambers (18) and a direct flow channel (16a) configured to exchange heat with one of the cylinder chambers (18), wherein the feed opening (12) is formed at a point where the circulation flow channel (16b) and the direct flow channel (16a) meet, wherein the water jackets (16a, 16b) have an arc shape which encloses the outer circumferences of the cylindrical chambers (18), and wherein the EGR cooler insertion section (20) is designed such that it extends horizontally in the longitudinal direction of the cylinder block body (10).