This is a common problem with Ford engines. A scratch is allowing exhaust gasses to seep past a head gasket and into a water jacket. Replace your engine coolant replaced annually until you are ready to have the heads resurfaced.
possible leaking heater core
Bad head gasket and/or cracked head.
It depends on if you see the antifreeze leaking or it is just disappearing. If it is just disappearing then a bad head gasket or cracked head may be the problem. The smoking could actually be vaporized antifreeze. If that is the case don't run it until you can get it fixed.
Sounds like a blown head gasket
Has it always been like this or not? If it is, then it is not really a problem. It is how the stereo was installed. An stereo can be installed to be turned on whether the engine is on or off. If the stereo cannot be turned off at all, then you have a problem with your stereo.
It could be that your head gasket is blown.
head gasket at shop rates $300-$500
Thermostat sticking. Replace thermostat and gasket.
There might be a leak in the water pump, or in the radiator. Maybe even check the radiator hoses for cracks and leaks.
Your intake is probably cracked. I had the same problem as well as others on a 98 LeSabre. I could smell the antifreeze and the fluid leaked down.
I had this problem and it was my battery,but could also be in need of antifreeze.
if fans are working and thermostat is good welcome to the world of northstar famous headgasket/faulty headbolt and stripped block crap engine problem