C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Calling Willcox

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Old Dec 14, 2016 | 02:56 PM
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Default Calling Willcox

I have a new repop GM 81 oil pressure gauge, # 25025147. I seem to recall you saying the resistor is built into the new ones. Is this correct, or is my all timers accelerating?
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Old Dec 15, 2016 | 03:05 PM
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Originally Posted by Big2Bird
I have a new repop GM 81 oil pressure gauge, # 25025147. I seem to recall you saying the resistor is built into the new ones. Is this correct, or is my all timers accelerating?
On a any new reproduction gauge, the resistor is made inside the gauge.


Willcox

Last edited by Willcox Corvette; Dec 15, 2016 at 05:22 PM.
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Old Dec 15, 2016 | 03:31 PM
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One is talking oil pressure and the other temperature. I didn't know the oil pressure gauge even had a resistor.

Last edited by 65GGvert; Dec 15, 2016 at 03:35 PM.
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Old Dec 15, 2016 | 05:21 PM
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good point... For some reason I had temp gauge on the brain.

Same deal though, all reproduction gauges have the resistance built inside of them. All cars 1974 and newer used a mechanical oil pressure gauge with a resistor.

I'll edit my post above.

Willcox
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Old Dec 15, 2016 | 05:30 PM
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Originally Posted by Willcox Corvette
On a any new reproduction gauge, the resistor is made inside the gauge.


Willcox
I appreciate the answer. I would hate to do THAT chore twice.
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Old Dec 15, 2016 | 06:25 PM
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No doubt... If you install a resistor you will put another resistor in a series... Which will render the gauge useless
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