Stacked plate heat exchanger housing and exchanger comprising such a housing

A housing of a stacked-plate heat exchanger, said housing defining a volume for accepting a plurality of stacked plates that are configured for the circulation of a fluid that is to be cooled and of a coolant, said housing further defining an interface able to accept a header tank for the fluid that is to be cooled and comprising a first part configured to move in the direction in which the plates are stacked when the stacked plates are being brazed, and a second part that has at least one flank defining said interface, said first and second parts being able to be assembled with one another when the plates are being brazed, wherein said first part includes two lateral walls, a top wall, and a continuous turned-up edge along the entire first part of the housing such that the turned-up edge of the top wall joins together the turned-up edges of the two lateral walls which extend about lateral and distal ends thereof and only the first part of the housing moves when the plates are being brazed, and wherein a terminal end of the continuous turned-up edge faces away from the volume for accepting the plurality of stacked plates.