Ok, I was driving to work today and when I stopped I noticed some white smoke coming out of my hood, so I popped it open and see that there is white smoke or steam or something coming out of the passenger side valve cover my car didn't seem to have any loss of power and it runs fine. I did just change the thermostat yesterday and while I was putting the throttle body back on I accidentally broke a tiny vacuum line that was very brittle. Other than those two things nothing is different. I think it might be the vacuum line but I just wanted some extra insight.

 

Bump .... I really need some help with this