My 1997 LeSabre recently started blowing this Fog through the vents that smells like antifreeze. I suspect the heater core is the problem but it is odd to me that it stops blowing this fog when I turn the heater on. Also on cool nights it won't defrost the windows.

Any Ideas?

Welcome to AF> Yeah, like you said heater core!

My 1997 LeSabre recently started blowing this Fog through the vents that smells like antifreeze. I suspect the heater core is the problem but it is odd to me that it stops blowing this fog when I turn the heater on. Also on cool nights it won't defrost the windows.

Any Ideas?

Are you going to try to change it out yourself?

I have a friend who is going to try and change it this weekend. Any suggestions? Mechanics giving me estimates between $350-$400. Ouch!

I have a friend who is going to try and change it this weekend. Any suggestions? Mechanics giving me estimates between $350-$400. Ouch!
http://i86.photobucket.com/albums/k110/imidazol97/HeaterCore2.jpg
http://i86.photobucket.com/albums/k110/imidazol97/HeaterCore1.jpg

IF I recall the clamps on the heater hoses from the engine compartment are hard to reach. There is a kind of plier for reaching and releasing those clamps.

Thanks, does the dash board have to come off to do this job?? My friend has never done this before but definitely has experience working on vehicles. How long does this typically take for beginners?

Mitchell book time is 2.5, add 50% for a first timer on this.

Thanks, does the dash board have to come off to do this job?? My friend has never done this before but definitely has experience working on vehicles. How long does this typically take for beginners?
Remove the hush panel under the passenger dash.
Remove the glovebox lid.
That should give enough access.
The lid on the heater box over the end is held on by two screws and some sealant caulking if I remember what someone posted after they did it.