When we blew the "Cash for Clunkers" up at work they billowed white smoke. Check your oil. Don't goto a shop saying "I need new LIM gasket." You'll pay out the anus and it might not even be that... Working at a shop, I HATE HATE HATE people that come in and tell me, a technician, what's wrong... They'll charge you for that and whatever else might be wrong.
Start with the basics and work from there. Check your fluid levels...