Cooling system for a motor vehicle

A motor vehicle cooling system, comprising:

• a cooling circuit, wherein the cooling circuit includes at least one internal combustion engine, one pump and one cooling device;
• a short circuit line, which bypasses the pump, wherein the short circuit line connects a pressure side of the pump to an intake side of the pump;
• a valve device, which is switched between at least a first position and second position is provided in the region of the short circuit line, wherein switching the valve device to the first position directs at least most of a coolant flow through the short circuit line, and when switching the valve device to the second position the entire coolant flow is directed through the internal combustion engine bypassing the short circuit line;
• wherein the valve device includes a valve tappet and two valve discs spaced apart in an axial direction on the valve tappet for directing the coolant flow;
• wherein the valve discs are disposed on opposing ends of the valve tappet;
• and
• a spring disposed between one of the valve discs and a valve seat ring for preloading the other of the valve discs into a closed position.