Abstract: The present universal radiator assembly is intended to accommodate or to be used as a replacement for many different types of automobile radiators. The main assembly includes a conventional radiator core and two semi-cylindrical tanks made from sheet metal. The tnaks may be partially formed and then the flat side of each tank may be soldered into position to permit free passage of fluids from the radiator core into the tanks. Then the free edges of the sheet metals member may be bent around into engagement with one another. These edges are severely bent or flanged, and are locked into engagement with a longitudinal lock rod of triangular cross-section which is open on one side. The tanks are then longitudinally soldered along the mating edges. The four ends of the two semi-cylindrical tanks are closed by mounting flanges having a large central aperture.