So i'm using the factory temp gauge with a standard GM temp sensor on my sbc crate motor. What I'm wondering is it normal for the temp gauge to be all the way to the hot side when the vehicle is off then work its way down when its running? The reason im asking is i just swapped my thermostat from a 190 to a 160 degree and now the gauge is hovering on the hot side. Before it would be in the middle after everything was warmed up.