A heat exchanger for a motor vehicle is provided, including top and bottom
headers and a core extending therebetween. The top header includes a
distributor plate extending along the longitudinal axis thereof to
separate the top header into first and second chambers. The distributor
plate includes at least one opening to permit effective distribution of
the liquid between the respective chambers. One type of effective
distribution causes the liquid to be generally equally distributed among
each of the plurality of flow tubes.