Heat exchanger especially for a motor vehicle

A heat exchanger suitable for a motor vehicle, comprising an array of finned tubes, said tubes each having a respective elliptical bell-mouth end, a collecting plate having a plurality of holes corresponding to the shape of said respective bell-mouth ends formed therein in which said bell-mouth ends of said tubes are each tightly fitted into an associated one of said bell-mouth holes, a collecting box having at least one lateral wall, said collecting box being mounted on said collecting plate, and stop means provided between said collecting box and at least one of said respective bell-mouth tube ends for enabling said stop means to engage at least a portion of said respective bell-mouth tube and thereby to prevent axial displacement of said tube associated with said respective bell-mouth tube end, said stop means having an individual finger for each of said tubes, said fingers being transversely disposed relative to said lateral wall of said collecting box and extending from said collecting box toward said respective tubes, each of said fingers being disposed parallel to a major axis of said respective elliptical bell-mouth tubes.