| Berth’s36 | -- 09-02-2026 @ 1:11 PM |
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I just bought an nos 35-36 temp guage ,before installing i placed it in water with an accurate thermometer and at 180F the red is at the top out of normal range and almost out of site? At 200F it is out of site ? Is this nos guage correct? When the red is in the middle of the 2 lines thermometer shows 122f , thoughts anyone? Is this worth installing? Or get mine repaired This message was edited by Berth’s36 on 9-2-26 @ 1:18 PM
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| ford38v8 | -- 09-02-2026 @ 2:41 PM |
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The glass bulb will show a scribe line which is to be adjusted to the indicated 212° mark on the gauge. You need not use a modern thermometer, as when water boils in a pot it is readily identified as 212°. Be sure to position the bulb fully within the boiling water and take care to prevent the glass bulb from hanging down, as the inverted position will allow air bubbles to enter the liquid portion of the tube, which will produce an erratic reading. If this has already happened, transferring from boiling water back and forth to ice water can help to rid the tube of bubbles. Do not in any case attempt to open the system to rid it of bubbles. Alan
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| Berth’s36 | -- 09-02-2026 @ 2:53 PM |
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Where is the indicated 212 mark on the guage and i see no way to move the bulb or the metal with the lines, can you explain or look at my pics and describe, thank you
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| Berth’s36 | -- 09-02-2026 @ 4:54 PM |
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Thanks Alan, i see the ‘scripe’ faintly on the side of the bulb and it seems to line up with the very top most short black line on the metal, is,it possible to move the bulb down in the metal casing?
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| ford38v8 | -- 09-02-2026 @ 7:06 PM |
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Yes, the bulb is held in the metal housing only by friction. It is movable up and down. …And I should emphasize once again, the bulb must be free of internal bubbles and positioned vertically to show accurate readings. Alan This message was edited by ford38v8 on 9-2-26 @ 7:14 PM
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| 40 Coupe | -- 09-03-2026 @ 5:28 AM |
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Unused gauges can develop an air pocket in the line which gives incorrect high readings. Suggest hanging the gauge vertical, with the glass up, and cycling the gauge, many times, to move the air pocket upward to the glass. This message was edited by 40 Coupe on 9-3-26 @ 5:31 AM
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