The system (10) has a cooler (12) with a housing (24) and a valve that comprises a rotatably operated valve element on an inflow side (20). An actuator (14) for the valve is attached to the cooler housing, and is connected with the valve by a lever (30) and connecting element i.e. coupling bar (32). A ball joint is provided between the lever and the connecting element, and the valve element is eccentrically provided with respect to a rotation axis in a direction. The valve element locks a valve seat around an entire circumference of the seat.
