temperature sending unit
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- sevenmilebridge
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temperature sending unit
Has anyone had a problem with a sending unit that sends the wrong voltage to the the temperature guage? Makes the guage read hot when its at normal temps?
65 Mustang work in progress 69 2000 Dialed in 69 2000 work in progress 70 1600 work in progress
- keith0alan
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Re: temperature sending unit
Yes, the senders seem to read high as they age. You can check the actual temp with an IR or candy thermometer.
- AidanDawn2000
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Re: temperature sending unit
Mine reads high. Gauge is is pegged when temp at elbow is only around 210.
Oil a little low? Time to get a longer dipstick:)
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1969 2000 SRL311-10440 (matching numbers, Solex!)
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1969 2000 SRL311-10440 (matching numbers, Solex!)
- keith0alan
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Re: temperature sending unit
You can calibrate it by putting a resistor in series with the sender. Get a 100 ohm variable resistor and put in line with the sender. Adjust to correct the gauge. Then measure the adjustable resistor and install a fixed one in it's place. However, if your gas gauge is also reading high then check your instrument voltage regulator.
- sevenmilebridge
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Re: temperature sending unit
I checked the water temp with a meat thermometer and it was about 70 degrees off. Its a new sending unit so the resistor sounds like the way to go to get it exact. Thanks
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- Nissanman
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Re: temperature sending unit
The gauge in my '65 1500 is actually adjustable, I don't know about later models.
There is a small hole in the rear of the gauge case and you can move the mechanism to fine tune the reading to that measured by a reliable source e.g. a thermo-couple device.
There is a small hole in the rear of the gauge case and you can move the mechanism to fine tune the reading to that measured by a reliable source e.g. a thermo-couple device.
Nissanman, just trying to help.
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Re: temperature sending unit
I'm having the same issue with my 67 1/2 1600. Gauge seems to be working but pegs the needle in a relatively short time. My IR scanner shows the actual temperature to be about 180 degrees. I'm curious to know if anyone knows if the factory gauge in my car has an adjustment like Nissanman's. If so, I'll pull it out and see if I can calibrate it. Otherwise I'll try the resistor. It's more than a little disconcerting to see the needle pegged while driving.
- Nissanman
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Re: temperature sending unit
When you view the rear of the gauge case, look for a plug or a round hole ~8mm diam.
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
https://photos.shutterfly.com/album/60141836519
On the road again!
1965 SP310 Engine No. G-93326 Car No. SP310-10817
https://photos.shutterfly.com/album/60141836519
On the road again!
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Re: temperature sending unit
Is adjustment with a small screw driver, an allen wrench or???
- Nissanman
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Re: temperature sending unit
Mine was a slide type device which you could move left and right with a small screwdriver.
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
https://photos.shutterfly.com/album/60141836519
On the road again!
1965 SP310 Engine No. G-93326 Car No. SP310-10817
https://photos.shutterfly.com/album/60141836519
On the road again!
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Re: temperature sending unit
Cool. Out it comes tomorrow.
- Nissanman
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Re: temperature sending unit
Good luck! Have a good look at the rear case and if it has a hole, use a decent magnifying glass to inspect the interior.
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
https://photos.shutterfly.com/album/60141836519
On the road again!
1965 SP310 Engine No. G-93326 Car No. SP310-10817
https://photos.shutterfly.com/album/60141836519
On the road again!
- steve_car
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Re: temperature sending unit
The 66-67 temp gauge does have an adjustment wheel. Also, the fuel and oil gauges have one.
Steve
65 1500
62 L320
65 1500
62 L320
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Re: temperature sending unit
Steve, good to know. My fuel gauge works, but has a very small range. When it's full the gauge sits at 3/4 and when it's empty it shows 1/4 full. Do you know whether this is a gauge calibration issue or a sending unit issue?
- AC77
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Re: temperature sending unit
That is good to know. Thanks Steve!steve_car wrote:The 66-67 temp gauge does have an adjustment wheel. Also, the fuel and oil gauges have one.