Abstract: An improved radiator assembly for supporting a cooling core has first and second push pads positioned contiguous to the opposite sides of the cooling core. The push pads have spaced apart slots therein. First and second side rails are positioned contiguous to the first and second push pads. The side rails have spaced apart tabs that extend within the push pad slots. The slots are of greater longitudinal dimension than the tabs thereby permitting the push pads to move longitudinally relative to the side rails. A plurality of tie rods extend between the side rails to hold the side rails and thereby the radiator assembly together.