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.