My old 16 year radiator suffered from spout embrittlement. The spout broke of while driving. I replaced the radiator with a new one. But now it takes 30+ minutes for the car to reach operating temp. The 945 doesn't reach or stay at normal operating temp while driving now. Also it will only reach normal operating temp while it's not in motion. Before the new radiator was installed, normal operating temp was reached within 5 minutes while driving. I'm just trying to figure out if I missed something. Maybe the thermostat (stuck open) perhaps ? Thank you.