So I had the typical temp gauge reading low, barely 2-3 needle widths into the white arc. And following thread searches, I assumed it was a missing/misaligned top gasket. So I gathered a new 190 deg stat, top and bottom gasket and figured no problem. So upon disassembly I discovered the top housing was pretty badly corroded as seen in the pics. So I assumed even with a new top gasket, enough coolant would leak past, and ordered a new top housing. After reassembly however, same symptoms, 2-3 needle widths into the white arc. SO either I have the coolest running LC in Arizona, or it's something else. Temp sensor? Gauge itself mis-calibrated? What's next to check?