1998 Plymouth Neon radiator

I know separate plastic tanks were available at one point, but Around my neck of the woods the rad shops stopped using them due to too many problems. I'd replace the radiator if it were mine.

Any coolant leak will cause an overheating problem as the coolant is not contained. Fans not working will also cause overheating.

You need to get the rad and fans working. Too much overheating can cause a head or head gasket problem that can overpressure the cooling system and blow out a radiator.