Gord&Fran My seapy round heater core will put condensation on my windows inside in cold weather,I then wipe them off nice and clean,open the doors they dry off and go. Gonna have to pay the piper and buy a heater core,cooling system is clean just hate stop leak,a friend swears by a heaping table spoon of black pepper. I'm sure you old bolters have heard of that,model T trick !!