Your heater core went and is forcing coolant vapor to enter the cabin through the vents. I wouldn't suggest driving for that long as the vapor isn't good for you. If you must drive it for any length of time, drain the coolant and replace with pure water, water vapor is just annoying, not harmful. As for the time for repair, you have to take the dash board off to access the heater core so it is quite time consuming.
Tuesday, October 6th, 2009 AT 8:02 AM