Chevrolet Repair: 96 chevrolet c2500, heater hose, coolant

Question
i have replaced my radiator 4 times this year cause it starts leaking in the core next to the tank why dose this keep happening i have also tried (d i water) and grounding it to the body

Answer
There is probably a small leak in the cooling system that allows air in and a minor amount of coolant out. The air causes corrosion and can cause it to break at the soldering point of the cores. Normally the leak is from the quick disconnect fitting for the heater hose on the intake.