The Stovebolt Site Forums The Shop Area Engine Shop Temperature sending unit for 235 in my 1960 C10 w/gauges

Hi, friends. I have some problems with the electric temperature sending unit in my 235 engine. My truck is a 1960 C10 with gauges. First, my sensor port is not 1/2 npt. I think it's 3/4, so when I put the NAPA sending unit with the coupling, my gauge show me 175 in top. So the sending unit is not for my gauge. So what is the correct sending unit???

Thanks a lot

edgardo - From what I've been able to find on original 1960 235 electrical temperature sensors, if your head is an original 1960 piece (check the casting date codes and number on the head on the top drivers side area near the carb and post them here to help us confirm), the port for the temperature sensor should be a 1/2" NPT (tapered thread) opening.

According to various Chevy Master Parts Books, your 1960 Chevy C10 235 should use coolant temperature switch assembly GM# 1315521. If your port is in fact a larger opening requiring a coupling, the coupling you have should work with this original GM sending unit to provide the correct signal for your original dash gauge.

Lots of various vendors offering original NOS pieces, just do a web search using that number and you'll find what you are looking for.