Optimum coolant temperature range....

[izzy]

What temperature should the coolant temperature be at when in operation? Is there an acceptable range? Just wondering.

 

[oddball]

The needle in the middle. There's a very broad range that the computer translates to "ok". When I was working on the fan conversion I think 200 to 230 left the needle in the middle.

 

[joegr]

The thermostat is supposed to be closed at 192° F and fully open by 219° F. I think that the few times that I have monitored mine while driving and idling, it was at 200° ± 5°. This was in the summer time.

 

[izzy]

It fluctuates between 210 and 220. The needle stays just below the halfway mark. So I'm good.

 

[fudge12]

I'm glad someone bought this topic up. Using an OBD tool, my car runs around 201-205F and after a half hour of driving the hydraulic fan is screaming but the coolant temps hardly change. The needle is always in the middle btw, never touches above the midway mark.