Mitsubishi Challenger 2013: Radiator issues?

My Mitsubishi Challenger is about two years old. It was recalled due to the possibility of overheating. The modification involved a new radiator cap and changing the radiator coolant. It was told this would reduce the likelihood of the radiator boiling. I do understand that a higher pressure cap will prevent the radiator boiling until the temperature is higher, but is it the correct solution to allow the engine to run at a higher temperature? Will the life of the engine be compromised?