In my quest to add an actual oil pressure sensor I noticed I don't have the dummy light sensor anymore. Shop must have taken it out when doing machining, because I don't have it. So I bought another one. M12x1.75 threads. I thought it would be easy to put a T right there and attach my new oil pressure sensor for the gauge in the same spot. Wrong! So hard to find an adapter! Adapters to the new sensors 1/8-27 NPT are fairly easy to find, but anything to go back is difficult. Open to suggestions there if anyone else has added an oil pressure sensor.
Related, does anyone know what the question mark pictured is? I assume its something since its shiny and not corroded like the rest of the block was.
View attachment 40772