Where does yours sit at idle? Mine stays right around the last white line to the red, that seem normal? Not driving just sitting.

 

my 97 z28 stays right around the 210 mark at idle. it will start to creep up but go right back down again. what temp does it stay at when your are driving it (city driving)? how about on the freeway?

 

Around the half way mark

 

mines stays right above the 160 on the highway. before the thermo is was right above the second tick mark. In traffic it stays right around the 3rd tick mark (210) becuase the low speeds fans kick on.

 

Just sitting in traffic mine stays at about 185. It is normally around 170 when driving.

 

Have your fans programmed to turn on earlier.....

 

brad,
the same thing happened to my car. I was so frustrated that i flushed the radiator and recovery tank. this cleaned out a lot of crap but the problem persisted. turned out that i had forgotten to bleed the cooling system after I had replaced my thermostat a few days earlier.

 

184 degrees on the nose.