I am also facing similar issues.
The car got heated up on a long outstation journey - got the thermostat valve removed - drove - it heated again - was on a long drive, so had to drive - engine got cranked - vehicle towed to a garage - got the engine fixed, changed water pump - problem reduced - on a long drive again - car got heated up again, cancelled the trip, drove back to garage, replacing / adding water every 25 to 30 km - now gone to garage for radiator cleaning.
God bless Honda City makers and users. Do'nt know, what to do - buy new car - if I have to buy the car it will not be from Honda family.