From: kludge@panix.com   
      
   Tires with slow leaks not caused by punctures or cracking are:   
      
   1. Leaking through the valve stem   
   2. Leaking through the valve core   
   3. Leaking through a dirty bead   
   4. Leaking through a puncture or crack that you missed.   
      
   I suggest putting a metal cap over the valve and see if that stops it.  If   
   it's leaking through the valve core, that is not a great permanent fix, but   
   it's a good diagnostic tool and you should keep the metal caps on there anyway   
   because it's cheap protection against future leaks.   
   --scott   
      
   --   
   "C'est un Nagra. C'est suisse, et tres, tres precis."   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)