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Old 09-23-2018, 11:21 AM   #1
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Join Date: Sep 2018
Location: North Richland Hills
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1970 250 I6 oil temp sensor

Just purchased a truck very similar to my truck in high school. 1970 GMC SWB stepside. I am newby basic tech. The truck had the basic dash cluster and I am in process of upgrading to Classic Instruments full gauge dash panel. I have been able to figure out all sensors except one, Classic has provided a engine temp sensor that they say should be mounted in the intake manifold. It is large and I cannot find where it would go. Any thoughts or guidance would be appreciated. Thanks
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Old 09-23-2018, 11:45 AM   #2
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Re: 1970 250 I6 oil temp sensor

It’s not oil temperature, it’s coolant temperature you’re hooking up.
Your 250 doesn’t have any coolant in the intake. Those instructions are for a v8.
Your sensor goes into the thermostat housing on the front of the motor.
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Old 09-24-2018, 03:52 AM   #3
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Location: Tucson, AZ USA
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Re: 1970 250 I6 oil temp sensor

On my '68 292 L6, the Temp probe is in the left side of the head.
It's between Intake ports #1-2 and Exhaust port #2.
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Every 25 years I like to rebuild that 292, whether it needs it or not.
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