[Shop-talk] extremely window fogging

[Eric Russell]

Usually a leaking heater core reveals itself by the sweet odor of the 
anti-freeze (but maybe not a types of AF have that smell). It might not 
be very obvious if it is a very tiny leak.

Buy, borrow or steal a cooling system pressure tester. See if it holds 
pressure overnight.

If not a faulty heater core, could there be a clogged drain? I assume 
the vents in the cowl take in outside air. Since rain or wash water can 
likely get in there must be a drain for it to exit.

Eric Russell
Mebane, NC