Smoke when braking!

I've got a Pontiac GrandAm 1989 auto with Vtec engine. The problem starts when I would come to a full stop there would be lots of smoke coming out of the grill and under the hood as if I was overheating!

Is this smoke or steam if it disapates quickly it is steam (which means you either have a water leak or are overheating) if it is smoke it will hang in the air much longer this could be something as simple as a valve cover leaking, a brake line leaking and hitting your exhaust manifold