A cooling system for controlling a temperature of a coolant for an internal combustion engine for a ship or a power plant, comprising a cooling circuit and a bypass fluidly connected to the cooling circuit and bypassing a section (A') of the cooling circuit, wherein the cooling circuit is configured to guide the coolant from the internal combustion engine into a high temperature HT-cooler and a device for absorbing heat from an internal combustion engine and/or an air charge cooler driven by a pump and the bypass bypasses the high-temperature HT-cooler, and wherein a two-way valve is provided to regulate the coolant distribution via the cooling circuit and/or via the bypass, wherein the valve is configured such that if the valve is in a closed position the coolant flows into the section (A') of the cooling circuit, and if the valve is in an open position the coolant flows into the bypass, and if the valve is in an intermediate position the coolant flows into the section (A') of the cooling circuit and the bypass, wherein a first conduit junction is provided to distribute the coolant into the section (A') of the cooling circuit in case the valve is closed or in the intermediate position, wherein the conduit junction is arranged upstream the valve, wherein the first conduit junction is configured such that a first conduit distributing the to be cooled coolant from the internal combustion engine is connected with a second conduit distributing the coolant to the HT-cooler, wherein the first conduit junction is configured such that a terminal end of the second conduit is at least partially arranged within the first conduit to distribute the coolant into the section (A') of the cooling circuit. comprising a cooling circuit and a bypass fluidly connected to the cooling circuit and bypassing a section (A') of the cooling circuit, wherein the cooling circuit is configured to guide the coolant from the internal combustion engine into a high temperature HT-cooler and a device for absorbing heat from an internal combustion engine and/or an air charge cooler driven by a pump and the bypass bypasses the high-temperature HT-cooler, and wherein a two-way valve is provided to regulate the coolant distribution via the cooling circuit and/or via the bypass, wherein the valve is configured such that if the valve is in a closed position the coolant flows into the section (A') of the cooling circuit, and if the valve is in an open position the coolant flows into the bypass, and if the valve is in an intermediate position the coolant flows into the section (A') of the cooling circuit and the bypass, wherein a first conduit junction is provided to distribute the coolant into the section (A') of the cooling circuit in case the valve is closed or in the intermediate position, wherein the conduit junction is arranged upstream the valve, wherein the first conduit junction is configured such that a first conduit distributing the to be cooled coolant from the internal combustion engine is connected with a second conduit distributing the coolant to the HT-cooler, wherein the first conduit junction is configured such that a terminal end of the second conduit is at least partially arranged within the first conduit to distribute the coolant into the section (A') of the cooling circuit.