Steer clear of far too much warmth. Far too much warmth could cause damage to a radiator in addition to ineffective soldering methods; both of those of which may lead to high-priced repairs and replacements. e. the sap I have collected from Douglas Fir trees. Below is an image of https://autobodyrepairestimatecal14827.techionblog.com/27316912/the-greatest-guide-to-types-of-solder-to-use-on-aluminum-radiator