[Bru]

Have you ever noticed how the rubber radiator hose tends to attack the aluminum housing at both places on the block causing pitting and rot? I solved this problem during my last rebuilt by wire brushing the loose metal rot away and then heating a little with a propane torch it to further flake off anything that wasn't solid. Next I mixed up some fresh JB weld from new tubes and smeared on a thin layer. After it hardened overnight it was just like a new surface, smooth and solid. Now the chemicals in the rubber hose can't attack the aluminum because the JB weld protects it.