Review on Irontite ThoroFlush: Powerful Automotive System Cleaner (468-9110-16) by Junior Andreano

I used this to fix some stubborn leaks that developed during a long drive and it wasn't really necessary as it was a hidden hose. After that the radiator wouldn't cool properly on the hottest Texas days, this flush solved that problem. ONE way to determine if a radiator might be clogged is fairly simple. if you're driving at highway speed on a hot day and your temperature rises while cruising on the highway at normal speed (DRIVING AT SPEED ON THE MOTORWAY - not much more than stopping and driving), if the temperature rises, that's a sign that additional wind assisted cooling is inefficient because no coolant flows through the radiator, i.e. some paths within the radiator are clogged such that the additional heat generated by the engine at highway speeds is not cooled by the partially clogged radiator. In a healthy system, the temperature should not rise, but fall very often, depending on speed and weather conditions. Keep in mind that this is just 'cause and effect'. There can be other reasons why the cooling system isn't working properly, but that's exactly what happened to me.