Radiator problem

my radiator dries for about 3 weeks without getting water from my reservoir.
then i fill in again the radiator and check for overnight if there some leaks but it still full;. and again,, for about three weeks the radiator again beginning empty and my temperature gauge starts to arise..

Model: Honda 97 model Vti
Location: Philippines

Its either leaking or you have a cracked head gasket. Check the shrouds on the top and bottom of the radiator they crack when theyre old. Also make sure the hoses arent rotted out.

Do you get a lot of white smoke when you start her up, or when you hit the throttle?