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Old 08-11-2008, 09:19 PM
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1960 chevrolet temperature guage test

The temperature guage pegs 220 after the car runs for a few minutes but the engine is not overheating. The sending unit and thermostat have been replaced but the problem persists. How can I test or find a short. When the sending wire is grounded to the block the gage pegs and when it is removed it returns to 0.

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Old 08-12-2008, 06:31 AM
F&J F&J is offline
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Is this a stock Chevy gauge or aftermarket?


If stock; it sounds like the gauge is reading incorrectly. If it goes to cold OK, plus climbs steady while heating up without any erratic jumps, it may be something you can adjust.

A lot of gauges have adjustments inside, you would need to remove it to see.



"If" you could find the exact ohms specs in a GM manual, you could test the sender with a meter. The gauge part could be tested with a potentiometer which is merely a "asjustable resistor".
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Old 08-14-2008, 07:01 PM
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Early model GM gauges should use a 0-30 ohm sending unit, but late model gauges (after about 1965) use 0-90 ohm sending units. Maybe they sold you the wrong GM sending unit at the parts store.

Bruce
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