If a lower radiator hose was replaced on a 1999 Dodge Grand Caravan, but it is still leaking fluid, it could be that there is a hole in the radiator. It could also mean that there is damage to the overflow reservoir or its hoses.
Check the radiator hoses. The coolant is either leaking out of the new radiator, or it is coming from a radiator hose. The water pump may be leaking. Hose clamps may be loose.
It could be a head gasket that needs replaced or a freeze plug needs replaced depending where the leak is coming from. It could also be a radiator hose.
Find where the fluid is coming out and repair/replace it.
Coolant leaking from the pump shaft.Engine overheating.Noise coming from pump.Coolant leaking from the pump shaft.Engine overheating.Noise coming from pump.
either your radiator is leaking,head gaskit is leaking if it's your head gaskit leaking you will have water in your oil or water coming out your exhaust pipe,or you might have a freeze plug going bad.
easiest way is to fill radiator and look and see where fluid is coming out, but Im sure you thought of that. The best way is to plug the ends of the radiator up with some type of rubber stopper then insert blow air through the drainport while holding it under water. Wherever the bubbles are coming from is where its leaking.
If your talking about coolant leaking on the passenger floor then it means your heater core is leaking and needs to be replaced.
Heater core would be the likely culprit here.
If leaking from the rail itself, the rail will need replaced. If leaking from a seal at the rail, replace the rail.
I would start with checking all the hose clamps and hoses to make sure they are properly tightened and not damaged. Also check that the thermostat housing is not leaking along with the water pump. Especially if any of these were replaced when the radiator was replaced. Also check to see if drain cock is closed. Also make sure the overflow hose is correctly routed to the overflow tank. You might just have to run the engine and open the hood and see where the leak is coming from. Good luck.
radiator cap might be leaking
Most likely the heater core is leaking. Has to be replaced.