Cadillac Deville Radiator Leak

I Had A Coolin Leak And I Put Two Types Of Stop Leak In My Radiator It Stop The Leak But Now The Car Tryin To Run Warm Now What Should I Do...

Are The Plastic Side Tanks Replaceable Or Do You Just Replace The Whole Radiator Unit If A Leak Develops On What Appears To Be The Side Tank...

Hi, I Have Put In Three Radiators And All Three Have Gone Bad On This Car. They Last Two Hundred Miles And That Is It. I Bought Two Off Ebay...