Snake
Mopar Nut
Working on the rad,cleaning,getting ready for paint.But I can see some calcium on the tubs,safe to pore CLR,over night than flush out.Cant afford a re-core as yet.
napa radiator cleaner http://www.napaonline.com/p/BK_80030
I agree that vinegar would probably help if you don't want to use harsh chemicals or have it rodded out. You ever throw a chicken bone in vinegar overnight? Turns to rubber - kinda comical.
and what possessed you to put a chicken bone in vinegar??
And what possessed you to put a chicken bone in vinegar??