RE: odor of burning rubber

["Binns, Dick" <dick.binns@intel.com>]

Just had the same problem happen on an 88 5kcstq in similar circumstances. 
Car parked three days at mountain lodge with lots of snow/ice and had to 
be dug out.  Started easily, but since then heater has been putting out 
burnt rubber smell all the time.  Began to smell as soon as the car warmed 
up, even before we drove it.  Odor reduces or goes away when heater 
control turned to low.  
          
Have yet to investigate, but does not seem engine related.  Speculating it 
could be piece of rubber against the heater core or something w/Cat.  I'm 
struck by event being brought on by extreme weather conditions in two 
cases.  Prior to parking in snow/ice we'd never encountered the smell.
          
Any other experiences out there? Thanks. 
Dick Binns
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 The other day (-15 to -20F), I cruised briefly through a  bit of 6 to 8"  
snow on our back roads and later on drove into town. On the way back, I  
noticed  a faint odor of burning rubber when the car was driven slowly  
stopped..........suspect something related to exhaust, CV boots, 
etc.--possibly caused by driving through the deep snow? It's 10F right now 
and I'll need to be laying on snow and ice to investigate, so any 
suggestions on where to look would be appreciated.
          
Phil
'91 200q