My 1991 940 turbo wagon is fogging up badly when the heat is on, especially after the car is fully warmed up. The centre tunnel under the dash below the heater box and one of the under dash vent on the driver side isa bit wet with coolant eventhough I can't smell anything. When you wipe the fogged up window and winshield, there seems to have a film. So I suspect it would be a leaking heater core. I know it is quite involved for a DIY job. Does anyone know what it would take a professional mechanic to do the job. As temperature outside now is around -20 deg C already, I don't think I will even try to tackle this myself and wonder what would I be look at in takeing it to the shop. Also, has anyone with experience for any good aftermarket heatcore such as Nissens?

thanks,

 

I think the labor is like10-15 hours or so. The entire dash needs to come out.

Nissens make a pretty good product. Also sounds funny but Hella makes them as well and they are pretty good.

 

I put a Nissans in my 92 940, did not like it because the the two pipes going through the firewall are at an angle, and had to f--k around making the holes bigger at an angle in order to make it fit, after all the work of putting in the core, is just more work for
a poorly designed product!

 

Harrison brand is a good replacement and fits properly. I have been told it is a GM product, as the whole heater assembly comes from GM anyway.