I have my 2006 Ford Expedition which is 290,000 km mileage.

What is your question?

The car is running good during winter season, but during summer I keep having this overheating issue, although I did flushed & cleaned the radiator and changed all upper & lower hoses and intake water elbow and still overheating. I have no oil leak from header seals. I have changed the fan clutch a year ago. Do I have to change it again or change the radiator with the thermostat and water pump to eliminate this overheating problem for good. Please advise what I have to do to solve this problem..??