You too, you have a leak. Find it and fix it before you get into some real trouble<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>d_man</b> »</i></TD></TR><TR><TD CLASS="quote">Well, it depends...<br>It's normal for the coolant to evaporate with time, so if you have topped it up a long while ago and see that now it's a little on the low side - then it's expected. On the contrary -if you filled it yesterday and today need to put some more - then you have yourself a problem. But in that case you'd have a pool of coolant underneath your car, or white (I believe) smoke coming out of your pipe, or some other indications of things going bad</TD></TR></TABLE><p>No smoke, and this is the first time I've had to top it off. Granted it's a used car and I've only had it a few months, but I'm pretty sure that it's just a gradual thing. No puddles or anything like that. I topped it off a few days ago, and I'm going to keep my eye on the level... Thanks for the help!
This a good possibility if you can't find a visible, or "external," leak, suck as hole in a hose or, in my case, cap had a crack, allowing it to escape under pressure and not hold full pressure.One other consideration, and it's not good. You could also find it in the engine oil if you have a bad head gasket. That's the worse case.