What does "flushing" a radiator involve?

Flushing a radiator involves cleaning the cooling system by removing old coolant and contaminants. This process is essential for maintaining optimal engine temperature and preventing corrosion or buildup that can impair the system's efficiency. During a flush, the old coolant is drained, and a cleaning solution may be circulated through the system to dislodge any debris, rust, or sediment. Once this is done, the system is rinsed and fresh coolant is added, ensuring that the cooling system operates effectively with clean fluid.

The choice to simply change the entire radiator system does not accurately represent the flushing process, as flushing specifically deals with the removal of old coolant rather than component replacement. Adding new coolant without cleaning would not address any existing issues within the system, which flushing uniquely rectifies by ensuring any harmful contaminants are eliminated. Finally, merely inspecting the radiator for leaks does not encompass the comprehensive cleaning that flushing involves; it focuses only on one potential issue without addressing overall system cleanliness.