I have always just welded a little circle of aluminum over the sheet metal casting core plug. Easy work for an experienced TIG welder (which I am not). Last one I had done took less then 20 minutes to have done, including making the little circle patches and prep. I let the welder make the aluminum circles, that way he could pick the type of aluminum, as well as the thickness, he wanted to weld onto the casting.
Last edited by Dragsix; 05/08/2019 6:10 PM.
