White smoke

Hey Abodies,

Sunday I did an oil change on my dart, change the oil (5-30) oil filter, and put in a new t-stat. When I was done I let it idle for around 5-8 mins and alot of white smoke was coming from the exhaust. But when I drove it around it stopped, unless I park it. I did make a little mess with the coolent. Any ideas I hope it isn't anything major.:oops: