steam from defrost vents

[Ron Wainwright]

  Listers,

  There is steam/smoke coming from the defrost vents
on my 90 200tq, I had the CC on OFF and the steam was
commin from the vents, and when I turned on the
defrost I could smell coolant and the window is foggy
but doesn't appear to be filmy
seems to be more noticeable when I'm drivin than
siting at a light
gauge read around 1/4 to 1/2 but got there in a hurry
I all so haven't lost any coolant that I'm awair of.

 I just changed the aux coolant pump and thermostat I
used the proper coolant,
is this the heater core just before it's about to dump
all the fresh coolant on the foot wells.
any help would be great
Thanks
Ron

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