A heat exchanger assembly for a vehicle comprising at least one manifold having walls defining a chamber for retaining fluid. A mounting device is secured to the wall of the manifold. The mounting device includes a seat portion adapted to receive a fluid transmission line. The mounting device further includes an opening extending from the seat portion and aligned with an aperture in the manifold for providing a fluid passageway between the manifold and the fluid transmission line. In addition, the mounting device includes at least one indentation formed therein for capturing contaminates and preventing an intrusion of the contaminates into the seat portion.