So..... i've had my car on the road for a little over a month, and have owned it about 2 (had a little oil pan mishap

). the previous owner informed me of a small coolant leak, saying it leaked onto the exhaust, and evaporated instantly. I had no reason to doubt him, so I left it unchecked for a while. Suddenly a couple of days ago, I decided to check it out.... opened the oil cap...... and found all the missing coolant. I believe this has been going on for a while, although it has yet to affect performance. How likely is it that anything (besides the head gasket) could be damaged? I can't find a replacement engine that I can afford anytime soon, and this is my daily driver. Pointers would be very helpful.