94 Chrysler Lebaron GTC replaced the water pump timing belt thermostat and set the timing it still overheats. Why?

94 Chrysler Lebaron GTC replaced the water pump timing belt thermostat and set the timing it still overheats. Why?
Ok if it over heats and you have done a preasure test of rad more than likely it is a slow leak on your head gasket causing a small amoun tof coolent to leak on the head thus you dont see the leak and the water is gone.... Good new is that now many option for you , first you can just do the head gasket if not go to any part store and get head gasket repair chemicals,, they work but there is one I know works well but not sure of the name.... Basicaly you put the chemical in coolent and run it ,, then open coolent lines (hoses taken off) and let chemical seal for 72 hours other chemical just ask you to run car for x amount of time.... look at options read instruction before buying,,, This will not last for ever but it will buy you some time I seen it work for oer 15,000 miles..Good luck