The coolant filter will have zero effect on your overheating problem. This filter sees only a small slipstream of coolant. It could be plugged and have no effect in this regard.
As stated above you need to have the radiator cleaned to provide better air flow.
Could also be a thermostat problem.
Have a sample of the coolant tested before replacing it.
Dennis & Carol
2003, 4006, 41' DutchStar,
Spartan, ISC 8.3L W/BanksPower - 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake. And the 04 Bird, Sunshine Car.