A couple of times during my last 2 rides in my '85 308 I got the distinct, but quickly-passing whiff of coolant upon taking very sharp turns. It would only last a couple seconds, then dissipate. I kept alert to this throughout these 2 trips--each one about 110 miles long, but only noticed when navigating very sharp turns. The temp remained fine, the coolant level is OK, and I don't see any signs of leaks anywhere--inside the car or out. Is this a prodromal symptom of something ? Could it be the heater core ? If so, is this located inside the cockpit or just on the other side of the front firewall?