The Ford Barn

barkleydave · 03-12-2015, 03:42 PM

Got my infrared gun out and took my truck out again. I ran her 45 mph and the gauge ran up to the red line 190 but not over. I stopped kept engine running and checked with gun. Block was 180 and upper inlet hose where sensor is was 165-170. Also the Motometer was up about an inch well below the marks for average summer temp

Radiator top was 160 bottom 145

So is the gauge off?

I did shut it down and did not take long for gauge to drop to 160 but head temp was lower around 155.

Obviously the engine is not overheating...

Has anyone else have this happen with the APCO gauge?

Thanks much.... THINK SPRING

03-12-2015, 03:42 PM	#1
barkleydave Senior Member Join Date: Oct 2014 Location: Kentucky Posts: 502	Apco temp gauge error? Got my infrared gun out and took my truck out again. I ran her 45 mph and the gauge ran up to the red line 190 but not over. I stopped kept engine running and checked with gun. Block was 180 and upper inlet hose where sensor is was 165-170. Also the Motometer was up about an inch well below the marks for average summer temp Radiator top was 160 bottom 145 So is the gauge off? I did shut it down and did not take long for gauge to drop to 160 but head temp was lower around 155. Obviously the engine is not overheating... Has anyone else have this happen with the APCO gauge? Thanks much.... THINK SPRING