You may have an exhaust leak that is coming up through the bottom of the cab. Burning antifreeze smells different than anitfreeze in the bottle--burning antifreeze smells somewhat sweet, when i was a kid i thought it smelled like the doughnut shop. Burning anitfreeze will also make white smoke, and your coolant level will always be going down. It is often caused by a leaking head gasket. CO2 is carbon dioxide. I think you might be thinking of CO which is carbon monoxide--the oderless, deadly gas. If this gas you are talking about is coming through your heater vents, you may have a bad heater core. Either way, it needs to be fixed.
While the above statement is partly corret, in that buring anti-freeze smelling somewhat sweet, and also make white smoke come as coolant level drops, neither CO2 or CO have any particular odor. If your 68 Ford was leaking coolant onto an exhaust pipe, it may cause symptoms similar to what you are describing... A fault heater core will cause you to have no heat and a wet floor, not white smoke...
I would suspect heater core. When I had that issue in a 69 Torino, the antifreeze would spray onto resistors for fan speed and fog up the windows appearing to be white smoke. It is not easy to replace a heater core, entire heater needs to be dropped down under the dashboard.
Sounds like a leak in the heater core.
The smoke is actually antifreeze mixed with air. The most common cause of this is a leaky heater core.
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.
If you mean "why", then the answer is that there is a leak in the heater core.
Have you spilt some on the radiator?
smell of antifreeze and no visable leaks usually indicates that the heater core needs replacing
if it smells like antifreeze inside the cockpit then your problem is the heatercore, since you can't see it.
your heater core is probably bad.
It is a 1998 Chevy Blazer. I don't know how I posted this topic in the first place???
Yes anti freeze has a sweet smell, at least in comparison to the normal fuel and oil smells of a car
What is the solid particle that sometimes comes out from the mouth or throat and smells really bad?
Some people say that the smell of hot antifreeze smells like mold. It could be possible you are smelling the antifreeze from the engine.