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Author Topic: Temp Sending - I6 250 --> 350 SBC  (Read 1366 times)

Offline BitterrootC10

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Temp Sending - I6 250 --> 350 SBC
« on: February 11, 2022, 03:49:59 PM »
I pulled the inline 6 250 out of my 76' last week, and I'm getting ready to swap a 350 in there. The 250 had two temp units and I'm curious which one, or both I need to hook up to get the temp gauge working. Here's a pic showing the two temp sending units circled in red.

Curious, why would it have 2 temp units to begin with?
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Offline bd

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Re: Temp Sending - I6 250 --> 350 SBC
« Reply #1 on: February 11, 2022, 04:06:18 PM »
Does the truck with the 6-cylinder have a temperature gauge or an over-temperature idiot light?
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline BitterrootC10

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Re: Temp Sending - I6 250 --> 350 SBC
« Reply #2 on: February 13, 2022, 12:52:19 PM »
I've got an actual temp gauge in my dash.
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Offline VileZambonie

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Re: Temp Sending - I6 250 --> 350 SBC
« Reply #3 on: February 13, 2022, 02:02:39 PM »
The one near the thermostat housing is the input for the gauge. The one in the head should be a switch. You can verify using an ohm meter. the front one should have a resistance value while the other should read infinite.
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