tried elevation and also ran with heat on, heater hoses warm, lower hose cold, upper is warm, temp past 210 shut off. I think I will pull the thermo stat and test it. I tried to fill it through the heater hose but it was full or at least not taking any more fluid.

The heater hoses are warm so that's good. I bought a new thermostat, will pull and check the one I have in now. This is extremely frustrating.

Did you remove the hose at the steam vent line until fluid streams out of the steam vent (not the hose)?

Also, did you rev the engine at all once it was near operating temp (at least 2,500 rpms)?

The solution for air pockets. http://www.amazon.com/UView-550000-A...words=Air+lift As a bonus it lets you know if there is a leak in the system before you fill it because it will never reach full vacuum. Irrelevant for your problem but it will eliminate the possibility of a pocket.

Have not removed the tube and I did rev it up to 3k but it did not move. I will try removing the hose. Thanks

removed the hose from the steam fitting got fluid out via vacuum nothing changed. I will take out the thermostat today and check it and or replace it.
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I pulled the thermostat and started the car, same result except I got water through the lower hose. There must be a nasty pocket by the water jacket or????? Thanks

When you rev the engine, do it in bursts, rather than a slow steady rev. Not sure if that makes sense. I've had to do that to burp a cooling system on a water cooled sportbike when steady revving wouldn't do it.

The last thing I thought was bad was the gauge and sure enough, before the water reached a boil the gauge went to 250. Time to call auto meter, that was a hateful two plus weeks. Thanks I will let you know how the new gauge works out.

Well I checked even further about the gauge and on Auto Meter's web site they list the same symptoms I was having to a bad ground. Long story short it is a bad ground. I changed the ground and the gauge stayed at 210 while the water was boiling. Thanks for all your help, I will know tomorrow or so when I crank it back up.

http://www.corvetteforum.com/forums/...ica-kinda.html