Overheating Problems b16a CRX

[5_LiTeR_EaTeR]

So far I have replaced Headgasket and waterpump while I was in there, Themostat, radiator, Coolant lines & Coolant temp sensor. It doesn't over heat right away.The needle will stick around middle of the gauge for a bit then just go up to hot. It will blow the coolant right out of the overflow bottle and then I have to refill it. when I do it takes about half a gallon. When the gauges reads hott it does't flicker at the top. When its really* over heating like when theres a bad coolant leak the gauge will go up and down sorta like a tach when you hit the rev limiter. I did a block check so I know its not a head gasket. The gauge just reads hott. For it to overheat it has to be mechanical so I am guessing maybe an impeller broke off the water pump. I replaced the coolant temp sensor twice. I get some heat thats not too hot but after a hard run it blows out freggin cold. I don't think its electrical. I am guessing maybe a coolant temp switch? I am thinking of replacing the water pump again. I know that the themostat isn't in backwards. I see it as a hard on going into the block. I know the shaft looking side with the spring goes towards the block but i am not sure on a honda. My idle goes up really high like to 3k but thats just prob the coolant temp sensor reading open loop again cuz it doesn;'t read coolant cuz it blew out and has a air pocket in it, therfore it will kick the idle up cuz it thinkgs the engine is cold. I dunno I thought I'd give it a shot here cuz I can't igure out wtf it is. My climate control panel is smashed in typical for a crx. I got all my parts for a 90 integra. Could it be possible to use a thermostat from a delsol? I dunno what else to do any input from you guys is greatly appreciated. Thanks!

~Alex~