So I'm slowly but surely losing coolant. I don't see any puddle up on the ground, I've recently changed the thermostat housing with a contour one, and everything seemed fine for a while. But I've had to refill the tank 2 or 3 times since I changed it in early December. I'm hoping it's not the head gasket, as the coolant doesn't seem to be making milkshake, and neither does the oil. No abnormal steam from the exhaust. Any ideas? 2003 SVT.