[G.M.]

Planojc you don't want Skips valve on a radiator with a pressure cap. If your radiator released water before Skips valve was installed and the valve cured the problem your pressure cap was to short and not seating down on the bottom seat like Stumps up above. If the pressure cap seats or you have Skips valve you can fill the radiator up to the filler neck and the engine will run cooler and not lose coolant. Henry didn't make a 22 quart radiator to put 18 quarts in it. 2 quarts low is about 12% low. G.M.