A cars cooling system always has a tough time doing the job it has that it was designed to do carry off excess engine heat.
Rust may clog the passages of your radiator. Why chance expensive engine damage or the ruin of a vacation due to unnecessary radiator damage. Radiator inefficiencies due to simple neglect of maintenance and prevention.
Rust may clog the passageways of your car or SUVs radiator. Hard water deposits a scale much like the mineral scales that clog your coffeemaker, humidifier or kettle at the lake cottage. These mineral scale deposits reduce heat transfer in your radiator. Simply put your radiator will not be able to cool your car engine. Your car or SUV will overheat. Your car engine, trip vacation at least your day will be inconvenienced and perhaps ruined. Even more if two different metals touch inside your radiator system them electrolytic corrosion can and will occur. Further trouble and radiator damage is possible.
If conditions are ideal or more than ideal for rust to form rust is guaranteed to form and deposit in the waterways of your vital radiator. Rust makes up about 90 % of all solids that can choke up the water flowing...