That is a bad sign.. You may have a cracked head gasket.
Antifreeze has to be put in at the overflow bottle.
Probably a head gasket problem or a cracked head. Sorry for the bad news.
Blown headgasket or an idiot pouring oil in the wrong hole.
if it rear air and heat it could be the line carring the antifreeze tho the back heater core.
low antifreeze , or faulty coolant sensor .
It would be a good thing to see where it is leaking from....
Probably a blown head gasket. If the car has an (engine) oil cooler it might be a leak there too.
Hello, I have a 97 Sunfire GT and had the same problem. The cap on the overflow bottle is pressurized and mine lost it's pressure. Once I replaced that I didn't have the problem anymore. ! You could also have a hole or crack in the overflow container
The nipple next to the heater core hoses is the drain tube for the a/c . The antifreeze is coming from the heater core , that is leaking .
According to the 1997 Mercury Grand Marquis owners manual : With engine oil filter change : ( 5.0 quarts / 4.7 liters of engine oil )
On the front of the engine, at oil pan height
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