Temp sensor question

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'64 Dart

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Good Day All and Happy New Year.
Installing a late 70's /6 with the 'peanut plug' head into a '67 Dart. The later head is tapped for a 3/8 pipe temp sender.
The '67 sending unit is 1/8 pipe sender. Any suggestions on a 3/8 sender that would be compatible for a '67gauge? I would prefer not to use a pipe adapter.
Use to have an older Echlin Buyers Guide that gave all the specs for these things, but it apparently went away.
Thanks to all who respond.
'64 Dart
 
Good Day
It depends on the Ohms value. That was the nice thing about the buyers guide, it gave you all that info.
The Dart has a gauge not a light.
 
Last edited:
I would use a reducing adapter and use the 1/8 sender.

Any sender that is 10-70 ohms should work. Sometimes they are listed as 10-80 ohms.
 
Good Evening
Thanks for the reply. So 10 to 70 Ohms is the range. That is what I needed to know. Haven't had much success finding out anything on the net.
Thanks again
 
While the operating range for a gauge is 74 ohms or so cold and 10 ohms full scale, a room temperature sender, at about 68F, will read around 300 to 360 ohms.
 
Just asking....but are you 100% SURE you're looking at the temp sender hole and not one of the heater hose barb holes? I ask because I HAVE a peanut plug head and it has the 1/8" sender hole, plus every year I look up shows an 1/8" sender.
 
If you truly only have a 3/8 hole available, just use the stock sender and a reducer bushing. Easy peasy.
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Good Morning all
I was going out to the man cave to take a pic of the head. When I turned on the lights there it was bold as brass a 1/8 hole for a temp sender.
I WAS looking at a heater hose opening. As this is the first 'peanut head' that I have owned the temp sender was apparently moved to above the #1 exhaust runner, instead of closer to the thermostat housing like the older 'drool tube' style.
Anyway, thanks for putting up with a idiot. I will have to find something else to obcess over.
'64 Dart
 
I wasn't aware that a 1/8 npt would accommodate a mechanical gauge.
I thought they were in the 3/8 range.
 
'64 Dart said:
Good Morning all
I was going out to the man cave to take a pic of the head. When I turned on the lights there it was bold as brass a 1/8 hole for a temp sender.
I WAS looking at a heater hose opening. As this is the first 'peanut head' that I have owned the temp sender was apparently moved to above the #1 exhaust runner, instead of closer to the thermostat housing like the older 'drool tube' style.
Anyway, thanks for putting up with a idiot. I will have to find something else to obcess over.
'64 Dart
Click to expand...
No problem. Glad you got it sorted out.
 
As an aside the peanut head does have a divot close to the thermostat housing that could be drilled/tapped for a mechanical gauge.
 
Why not just use an electric gauge? That way you don't have to drill anything.
 
Good Afternoon
The factory gauge is electric. A mechanical gauge, if installed, offers a backup.
 
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