[shorod]

Is the smell from the engine compartment or the exhaust? If from the engine compartment, and the leak is not noticeable, it's probably not a head gasket but rather a small hose or seal leak that is allowing a small amount of coolant to drip on something hot and burn off before it hits the ground. If the smell is from the exhaust, then head gasket or cracked head could certainly be the issue. A cylinder leakdown test would help identify that.

-Rod