You might have a bad head gasket, cracked block allowing coolant to leak into the combustion chamber. check your coolant level, mark the tank when its cool, and check it every couple of days to see if it is going down.
Telltale sign is WHITE smoke coming from the exhaust that smells like Antifreeze.
Condensation in the exhaust train is perfectly normal. It should dry out after several minutes. If it smells like antifreeze, suspect a bad head gasket.
don't ever smell your car's exhaust.
because of the exhaust
The car exhaust smells like the rotten eggs as a result of the hydrogen sulphide. This usually happens, when the engine is not serviced for a long time.
If you mean "why", then the answer is that there is a leak in the heater core.
probably an exhaust leak, at or near the exhaust manifold
Likely an exhaust leak
smell of antifreeze and no visable leaks usually indicates that the heater core needs replacing
there is no water mixed with the oil but have antifreeze coming out of the exhaust
if it smells like antifreeze inside the cockpit then your problem is the heatercore, since you can't see it.
it's a sweet smell, but it's a nasty smell. it smells like burning coffee and antifreeze. sounds weird but that's pretty much what it smells like