Decatur is a small city located in northeastern Georgia, just 5 miles northeast of Atlanta. The city was founded in 1823 at the intersection of two Native American trails and named after US naval hero Stephen Decatur.
The main function of a head gasket is to hold engine compression while keeping oil and coolant circulation separate. Undetected blown head gaskets cause coolant and oil mixing, which could lead to severe engine damage, such as engine block cracking.
Water in the cylinders will blow the head gasket. Any water through the carbs. (not likely on a car, easy on a tractor!) or a head gasket break that allows coolant water to leak from water channels to cylinder. Water is effectively incompressible and the piston on the compression stroke will try to compress it.