What did the "smoke" smell like? I suspect you have a bad heater core, in which case the smell would have been of hot coolant, not a burning smell. If that is your problem, you need to replace the heater core. This is not a fun job, but it is one you can do, if you have the FSM to guide you. Most radiator shops will take your old heater core and replace the core part, making it good as new - it will probably cost under $100 if you do the R&R yourself. Dick Benjamin ----- Original Message ----- From: <DONALDDICKINSOND@xxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Saturday, March 20, 2004 6:01 PM Subject: IML: Smoke From Air Vent on my '67 > I took my '67 Imperial out for a drive the other day, finally a warmish day! > After about 10 minutes of driving a small amount of smoke was curling from > the vent to the left of the temp controls. The temp control was off. What is > the most likely root cause and is the fix a major project? Another clue, > maybe, early in the winter I added additional coolant to the radiator and turned on > the heater to circulate the coolant through the heater. I began losing > coolant until I turned off the heater (coolant was running down behind the engine > but not on the floor in the car). Is this related or another problem entirely? >