After the Deep Freeze of 2014, I thought I had solved all of my heat/coolant issues. Except, it seems like after driving my car is smoking...err...steaming more than it used to (the smoke comes from the valve cover) My car is running at optimum temperature, but it seems like my radiator might have sprung a little leak? I saw some coolant sitting at the bottom of my radiator. However, I'm wondering if that could still be from the coolant that was leaking for a day when I didn't put the radiator hose back on right. And, maybe its from that coolant leaking that was spashing around, and I am being a hypochondriac. Any ideas? I did replace the thermostat. And, I (pretty sure) did it correctly.