I am trying to repair my dual Smiths oil pressure/temperature gauge. The
oil pressure works fine but the temperature gauge won't budge. So, I have
completely disassembled it and have found the only thing that can't be
working is the temperature sender from the engine. To me it looks like the
sender is filled with liquid and a tube connects it to the gauge. The
liquid must expand during heating creating pressure which moves the needle.
I guess the liquid in mine has leaked out or has air in the line. Anyway,
it looks like at the end of the sender there is a small hole which has been
soldered over. It looks like this is the fill hole for the liquid. Is it
possible to drill this out, refill and solder closed. If so, what is the
liquid inside. Alcohol, maybe? If not, does anyone know where to get a
temperature sender, or a complete gauge at a reasonable price?
Mike
64 SIIA
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