If if starts bubbling even if the engine is cold, most likely blown head gasket. If only when engine warm, stuck thermostat.
Failed radiator transmission cooler.
Why won't the radiator fan start on my 1991 dodge caravan?
What is wrong with your radiator?
Broken water pump.
On the bottom or side of the radiator.
get a new radiator.
most are on the bottom left side of the radiator
It is in front of the radiator.
Low coolant or an inoperative radiator fan.Low coolant or an inoperative radiator fan.
The thermostat on a 1999 Dodge Caravan is under the housing where the upper radiator hose attaches to the engine.
Green
On the radiator side of the engine.