If you mean engine coolant is getting into the car, the heater core is leaking coolant causing the coolant level to drop and that causes the engine to over heat.
There are several causes that will reduce the water level in your car radiator. The most common cause is evaporation. Engine overheating will also reduce the radiator water level.
A bad water pump can cause your car to stall if the bearing has failed or it is causing overheating. A seized bearing will put excessive strain on the engine and stall it out.
There are several reasons why your car may be overheating. Check the thermostat to be sure it isn't stuck. If the car revs up and down, the timing may need to be adjusted.
it sounds like it's overheating. Check it has coolant fluid in, if so, then it could be the water pump system.
If the engine is not overheating and the temp gauge reads normal, the thermostat is doing its job. If the engine is overheating, the thermostat may be stuck and in need of replacement.
your car is broken
Check the thermostat, it may be stuck in place.
check your coolant levels & if car overheating, might well be the cylinder head gasket is away.
It's steam from boiling coolant (or water) coming out of the overflow hose connected to the top of the radiator just below the level of the cap.
Is your fan coming on?
It could just be that the water pump is not properly working. Have you checked all the could-be causes for your car overheating if not then do so.
Your oil is probably leaking. If the car is old, then it's likely to be scrap!
Your car is overheating when idle because there may be a lack of oil or water in the engine. It can also be a problem with the engine itself. If your car is overheating, simply contact a wrecker or a road assistance company. The police are also available to assist you.
Maybe the belt for the water pump is loose
If your Ford Aerostar is overheating and losing water, it may be a bad radiator. You need to take your car in to get serviced.
probably a bad water pump................
Either the water pump impeller is loose on it's shaft, or you have a leaking head gasket.