with a bad head gasket, coolant could get in the pan fast from various routes, including down all the cylinders, so the walls are washed down to rust the rings over the winter, would be better to drain the engine rather than try to fill it with antifreeze .... and after you've done that - and drained the pan so the bottom end isn't sitting in water - pull the plugs and shoot a bunch of lube in, or get the head off and oil the cylinders
Bill
