[Z06vette]

What temp is the car running at when standing still? What are your fan on/off temps set at? I find that air gets trapped in these setups often when firt installing everything or when the system has been drained. If one hose is cold, its not circulating,obviously. Doubt 3 thermostats are bad. Do you recall how much coolant you poured in? If the motor was bone dry initially, it will take 2.5-3 gallons to fill. To help purge the system, I found that driving the car to get it up to temp- maybe a couple miles. Then park it overnight, removing the cap after it cools. Most times, the next morning I can add anywhere from 1/2 to 3/4 gal of coolant. Keep us posted