Well a have problem with dodge I put 4 ratiators and stil pop

If by "stil pop", you mean that the radiators are exploding (cracking/leaking), you have a problem that isn't very common. The first thing I would suspect is a radiator cap that is holding too much pressure. Ask your mechanic if he pressure tested the rad cap. If he hesitates when he answers, or looks confused, run away and find a new mechanic. The next thing I would suspect is a bad manufacturing run of cheap radiators. Unfortunately without more information, it's fairly tough to guess at what might be going on. Overall, if your mechanic has already tried four different radiators, and still isn't sure what's happening, you need a better mechanic.

How much cooling system pressure does it have, has that even been checked??.. Ever see any white smoke from tail pipe???.. Engine mysteriously overheating at random?????.. Does this "mechanic" usually work on automobiles??????