I'm pretty sure my jeep was just built to leak coolant. After replacing the heater core, hoses, water pump, and thermostat all on separate occasions, the radiator finally let go. My question is whether there are different thicknesses of radiators from the factory. Was there ever a heavy duty cooling option or something like that? All the replacement radiators I see on line are single row units, so I just wanted to make sure I'm ordering the correct radiator. I have a 2002 GC limited with the 4.7.