On a normal car engine every gallon of gas burned, creates about a gallon of water as a byproduct of normal combustion. This can usually be seen on startup or cold weather driving.
A small amount of steam seen at the exhaust at times is normal especially if the exhaust has not reached operating temp.
On the other hand if you are running antifreeze and the exhaust white smoke smells sweet or if other drivers are pointing at your vehicle because of the smoke or are having to pull over because they can't see, you may have a water leak into the combustion area.
Last edited by sc3148; 08-09-2003 at 03:00 PM.