If you recently drained coolant or antifreeze or need to refill the coolant system because it’s below normal levels, bleeding the coolant system will remove air pockets that can form when adding new coolant. Air pockets can prevent the cooling system from working effectively, which can affect other areas of your vehicle like having less interior heat. This post explains how to bleed the coolant system properly to keep air pockets from forming and keep the coolant system performing at its best.
