the coolent leaks after I put 4 cups of coolent into the
overflow tank on 1997 Cadillac Catera

I canot drive over 2 miles before it starts to over heats

Asked by for the 1997 Cadillac Catera
DO NOT DRIVE THIS CAR ANYMORE. Until the coolant leak is found. Coolant does not evaporate. You have a leak. Hopefully you haven't overheated to much and allready done engine damage.