I don’t know which name it has in it. I’m thinking to test I could let the motor idle a while. It normally will run hot after several minutes at idle without the manual cooling fan on. Even if it’s stuck open it should more than likely run hot? I can use the infrared temp to measure too. Also I’ll post these 2 pictures of two different temperature probe areas. One on the thermostat housing (the one piece I’m using now) Then there is one in the head that I don’t use & don’t have one to use on it. ??
1953 Chevy 153A 3/4-ton Working on my project since 2015 Follow along in my DITY
