hope not, but to me too...
have you tried to blow compressed air in the cylinders?
(through spark plug holes, with a high gear in, e-brake & a brick to stop a wheel... etc)
white should be water...
if the crack in the head gasket is between the cylinder and the water channel, then you should see bubbles in the water expansion tank.

if it is between cylinder and oil channel, then you might feel blowing a little from the crankcase (or from the valve cover) ventilation hoses. not every time this one works...