From: mik@localnet.com   
      
   "Chips"  wrote in message   
   news:zpWEj.3986$qT6.1402@nlpi070.nbdc.sbc.com...   
   > Sounds like the thermost (the thing that blocks waterflow until the temp   
   > gets up) is opening late.   
   >   
   > It has a little hole in it to let water flow enough so that it gets to know   
   > when the water is hot.   
   >   
   > Is that hole plugged with a flake of something?   
   >   
   > GC   
      
     That little hole is in the thermostat so that air can pass by, this prevents   
   an air bubble from forming around the thermostat. The water gets plenty hot   
   even without moving.   
      
      
   >   
   >   
   > "Geoff"  wrote in message   
   > news:e622a952-b3ff-48d0-a203-db99bc7b2815@e39g2000hsf.googlegroups.com...   
   >> The situation: at idle, truck warms up normally, then after a fer   
   >> minutes the engine temp gauge moves slowly up into the red zone, then   
   >> suddenly drops back to normal, and stays there.   
   >>   
   >> The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.   
   >>   
   >> Maintenance so far. Cleaned radiator, replaced hoses, replaced fan   
   >> clutch, replaced engine temp sensor, replaced thermostat. Coolant is   
   >> at normal level, no sign of loss.   
   >>   
   >> Any ideas?   
   >   
   >   
      
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