ok, when i have my A/C turned on in my 92 teg with a b16a the temp guage will go up about 3/4 of the way up stay there for a while then go back down.the thermostat is brand new and both fans come on. what could cause this? only thing i think could do this is the fact that my radiator has only water in it. any suggestions?

 

Flush your radiator, and put new fluid in and try again...