| MICHV8 | -- 06-17-2025 @ 6:52 AM |
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I have a 59 AB with 2 sending bulbs (wires had been cut) and want to wire them on a toggle to a gauge. Are there reasonable gauges that don't have their own sending bulbs attached? Thanks for the help!
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| TomO | -- 06-17-2025 @ 9:43 AM |
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The sending unit with 2 terminals is just a high temperature switch. The one with 1 terminal adjusts the current flow to show the temperature. You can buy 39-48 dash units for less than $25 apiece and mount them in your own mount. I have seen them on E-Bay for $10 and up. Tom
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| carcrazy | -- 06-17-2025 @ 9:48 AM |
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Are the temperature sending units located in the cylinder heads the original stock units? If so, the unit with only one wire is the sending unit that measures temperature. The two-wire unit is merely a thermal switch unit that contains a bimetal which opens at the boiling point of the coolant. If you are looking for the most accurate way of measuring the temperature of the coolant in each head separately, the best way to do it is by using two mechanical temperature gauges. These could have the gauges mounted in a panel below the dash board. Borg-Warner offers suitable gauges for this purpose.
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| MICHV8 | -- 06-17-2025 @ 10:20 AM |
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My 39 with the 59AB has the original 39 temp gauge that has the dreaded air bubble gap. I tried heat, ice cold, vibrations, etc. to get the air gap to move back to the glass bulb with no luck, so it sits in the original gauge cluster showing all red. And yes the 59AB has the one terminal sending bulb on the driver side head and the 2 terminal sending bulb on the passenger side, so I'll just use the driver side. Thanks for the info...
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| MICHV8 | -- 06-17-2025 @ 10:28 AM |
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what kind of signal does the mechanical gauge receive...my 59AB doesn't have a capillary tube like the 39 so I would need to buy a unit that fits the head, right? This message was edited by MICHV8 on 6-17-25 @ 10:31 AM
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| carcrazy | -- 06-17-2025 @ 11:22 AM |
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Usually when you buy a good Borg-Warner mechanical temperature gauge, several adapter fittings are included with it so the sender can be mounted in almost any engine.
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