i have seen about a dozen blow 4AGE headgaskets.. most of them bewteen 2-3...

could be a cracked head also.. which i'm sure you'll agree is alot worse than a headgasket..

is this after the car has been running for a while? like 30 mins of driving??

just trying to make sure your not getting worried about the steamy stuff that comes out the back of all cars when the wheater is a bit cool..