Yep. Been there. Done that. Got fussed at for messing up the stove and wife's pots and pans with truck parts and pieces.
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Dang, got an Out of Stock from Summit. They seemed to have the best price I saw anywhere too. May have to wait on one to come in.
Well, it looks like the middle mark on my temp gage is 180 degrees. The cheapo Ames point and shoot worked great too. It was interesting shooting the thermostat housing and being able to watch it warm up to 160 degrees and then feel the radiator hose warm up as the thermostat began opening. Got up to 180 and just kinda stayed around that temp while at an idle.
Perfect now you know! Those things work amazingly well. I thought they were a gimmick or a guess at best. Then I rested a few against boiling water. The one I have is very accurate.
We have several Snap On temp guns at work for checking brake temps. They are calibrated once a year and are certified, but you can take all the guns and measure the same spot, and they all read different on the tenths scale. The cheap guns that we are issued to check forehead temps for Covid are much more accurate/consistent overall.
Wow tenths scale! Now that's a nice temp gun. I am happy if it reads within plus or minus a couple of degrees.