Originally Posted by TJP
Originally Posted by PhillyRag
Quote
how about using an infrared heat gun to check the top and bottom of the radiator, as well as the heater hoses, to get some idea of how hot the engine is actually getting ?


"Correcto"
Folks will spent $hundreds on cooling system parts to fix heating issues,
But don't have, or use, an infrared temp gun.
Being so cheap these days, they should be as common as an adjustable wrench.
Best "tool" to have when questioning accuracy of gauge, digital or analog.


The IR guns are good for an indicator but not always accurate unless calibrated to the surface they are reading. Better yet use a thermocouple and know for sure, Most cheap DVM's come with them wink


I agree.

The old $99 top of line Sears Craftsman Infrared units had the added plug to compare its reading to thermocouples, and could adjust the ‘emissivity”.
similar to this unit:

https://www.amazon.com/Thermometer-...NXJFF8/ref=psdc_9931459011_t2_B00EXYPVG2

The way all things digital are declining in price I hope our low end cell phones will soon have thermographic ‘pit viper vision’ display at no added cost.

Even troubleshooting electrical devices it is useful to have “pit viper vision”.