My radiator gets foam in it. Not a lot just on surface and it goes away few moments after shutting off car. I read through ohter threads. Some say head gasket, some say intake. Some say exaust. I would like to know how to tell which one. No water in oil. No oil in water. Does not overheat really. But when I crank over ingine it like burps out with each crank. I don't know if I should flush and replace all hoses. it is just odd. It is like it just has a lot of pressure in system

 

If its burping out with each crank it may be getting combustion chamber gasses (or compression) in there. Head gasket.
You can get a block test kit from Crapa (or is it Napa) auto parts.
You fill a tube with a blue liquid, press one end to the radiator neck (helps to have the coolant level down) and with a suction bulb on the other end, draw the air into the tube. If the liquid turns yellow there are combustion chamber gasses present.

 

Sweet. I will check it out. Then if head gasket it must be a small crack cause no other signs.

 

Look closely at your gaskets. You should be able to see between a wate rjacket and a cylinder where its leaking. If you see something that is good. Also look closely at your heads. If cost is not a big factor then it may be a good idea to take them and have them checked at a machine shop.