Ninety-Nine SE-L said:it can sometimes just be steam from any water in the exhaust or that was sucked in from the atmosphere on a humid day. I wouldn't worry about it just yet. Watch your coolent levels, if you're mysteriously losing coolent and there are no leaks, then it's prolly a blown head gasket.
Uh oh.. My coolant has been mysteriously disappearing for a while now, but I can't find any leaks.. I hope I'm just not looking hard enough.