23-08-2020, 06:45 PM
The radiator is supposed to be filled with water not antifreeze; though a corrosion inhibitor (and anti-freeze does contains those) is generally a good idea. As I'm fond of repeating, a car using anti-freeze will run hotter than one with plain water in the radiator. When anti-freeze was adopted by the motor industry cooling system capacities were increased to accommodate this, the Austin Seven was not one of the cars so modified.