When is coolant temp too hot. About 216

...i was told temp. guns can vary 20 degrees depending on the surface you shoot i.e..chrome,alum. flat black,textued,gloss etc.
..your delta T should be about 40 (top of rad compared to bottom )if it's doing it's job.
still you should not be going above 200 or so.
.clutch fans turn at about 80% pulley speed and aren't always adequate at slow speeds and the older 7 blade fans can block air movement at highway speeds.
.but first spend the money on a good gauge/sending unit to confirm your temps.