Rust and Corrosion Inhibitor
Because of the chemical reaction between metal and the lime or other minerals in water, one U. S. pint (.833 Imperial pt., 0.47 liters) of an approved inhibitor such as Studebaker Cooling System Rust Inhibitor or Resistor should be added to the cooling system of every new car and replenished as needed throughout the life of the car. This will help protect the entire cooling system (radiator, cylinder block, cylinder head, and water pump) from any chemical corrosions, rust, or calcification within the radiator core which may restrict the passages. This does not, however, dispense with the need of flushing the cooling system seasonally, spring and fall. Following each draining a pint of the inhibitor should be used unless it is included in the new coolant.
Many anti-freeze compounds do contain a rust inhibitor. Ask your dealer whether the anti-freeze you use during the winter is of this kind. If so, it will not be necessary to install a rust inhibitor in the cooling system while such an anti-freeze is in use.