You're more likely to find the total cooling system capacity (radiator + engine block + hoses) than just the radiator alone in readily available resources. Expect that total capacity to be in the range of 10-12 quarts.
To get the most accurate figure, I recommend:
* Checking your owner's manual: This is the best source.
* Consulting a repair manual specific to your 1994 Concorde: Chilton or Haynes manuals often provide this detail.
* Looking at a diagram of your cooling system: Sometimes diagrams will show the capacity of the radiator specifically.
Do not rely on a generalized number. Always refer to your car's specific documentation for the correct amount of coolant to use. Overfilling can be as damaging as underfilling.
