There are a number of places that coolant can leak from. The radiator itself, upper and lower hoses, heater bypass hose and so on..I am afraid you will have to really look very closely and try to determine the source. Do you have the 4 cyl or the 6 cyl engine?

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.