My car was over heating and keep having to put coolant in evry 15 minutes. Monroe said he looked underneath car and said radiator is shot, He said I need whole new radiator. How do I know if it os fixable with out buying a new one?
You gotta determine why it's leaking. If there is a hole corroded through a tank or cooling tube, you are wasting your money trying to patch it. I did that on mine one year. Six patches on six groups of holes in six weeks.
If just a hose is leaking, replace that. A leak that bad shouldn't be too hard to locate.