OK, call me stupid but I can't seem to find the marketplace. I'm going to be looking for a heater core for an 89 4Runner with A/C. I'm blowing an odourless smoke out the vents, but it only stays above 3K RPM, and goes away completely when I turn of the AC. Guessing that the heater core has a leak under pressure. Does anyone know if there is a "Sealant" I can use temporarily to get it to stop (high heat and humidity here in the 'peg is drivin' me nuts). Is there anything else that it could be? And the next question is does anyone have one that they would be willing to part with and for how much?

 

OK, found the market place, but apparently after looking at the FSM I need an evaporator, not a heater core. My bad....

 

Are you sure that's not just condensation fog from the a/c?

 

I suppose it could be, but how would i test it? would it not condense on your hand if you held it in front of the vents?

 

Thats pretty normal. A sort of whitish mist, only when the AC is on right? Its just condensation. Normal.