After both of those metals have arrived at their wished-for temperature vary and have been removed from each other safely, there should still be some excessive solder still left in excess of on either side of these which desires cleansing off very first just before further inspection takes area. JB https://cristiancdvrp.dailyhitblog.com/32672891/the-definitive-guide-to-types-of-solder-to-use-on-aluminum-radiator