The Ford Barn

Bob Bidonde · 05-09-2024, 07:39 AM

I have a relatively new reproduction Rex-A-Co Temperature Gauge in one of my Model A's that has stopped working. Has anyone had this experience and found a fix?

mcgarrett · 05-09-2024, 10:16 AM

Bob,
I also have a Rex A Co gauge that I've had for over a year. It hasn't failed but I'm concerned about its accuracy. Although my car has never steamed over or spit coolant out the overflow tube indicating an overheating condition, it tends to show the temperature in the "Danger" area of the gauge on warmer days here in Texas, but normal on cooler days. I have checked my temp with a laser thermometer when the engine is at full operating temperature and it doesn't seem to show any cause for alarm. I'm wondering if it's calibration is off. I hope you are able to find a fix for yours. Keep us posted.

Gene F · 05-09-2024, 02:50 PM

I have had mixed results with the laser gun... Find a guy in your local club that has one of those thermometers you can drop in the radiator. Fill it up, and drop it in. Then compare the gage inside the car.

Banditorama · 05-09-2024, 04:48 PM

Put the sensor end in a pot of boiling water and see what it reads. Should be 212f

The Master Cylinder · 05-09-2024, 05:08 PM

Quote:

Originally Posted by Banditorama

Put the sensor end in a pot of boiling water and see what it reads. Should be 212f

At sea level.

Bob Bidonde · 05-10-2024, 08:59 AM

Sponsored Links (Register now to hide all advertisements)

The needle is stuck at 140F on my Rex-A-C0 gauge. I suspect that the line from the sensor probe to the gauge has an issue. More to follow.

katy · 05-10-2024, 09:25 AM

Contact Rex-A-Co

Alternately, here's a link on how to repair your gauge:

https://www.jalopyjournal.com/forum/...ement.1043778/

Synchro909 · 05-10-2024, 05:40 PM

I had one stop working a few years ago. I took it to my local instrument repair shop where they fixed it but it cost as much as a new one.
My advice is "buy a new one".

woofa.express · 05-12-2024, 04:21 PM

Quote:

Originally Posted by Synchro909

I had one stop working a few years ago. I took it to my local instrument repair shop where they fixed it but it cost as much as a new one.
My advice is "buy a new one".

Hi Synchro.
I call that practice maximum extraction.

05-09-2024, 07:39 AM	#1
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,498	Temperature Gauge Issue I have a relatively new reproduction Rex-A-Co Temperature Gauge in one of my Model A's that has stopped working. Has anyone had this experience and found a fix? __________________ Bob Bidonde

05-09-2024, 10:16 AM	#2
mcgarrett Senior Member Join Date: Dec 2013 Location: Waxahachie, Texas Posts: 957	Re: Temperature Gauge Issue Bob, I also have a Rex A Co gauge that I've had for over a year. It hasn't failed but I'm concerned about its accuracy. Although my car has never steamed over or spit coolant out the overflow tube indicating an overheating condition, it tends to show the temperature in the "Danger" area of the gauge on warmer days here in Texas, but normal on cooler days. I have checked my temp with a laser thermometer when the engine is at full operating temperature and it doesn't seem to show any cause for alarm. I'm wondering if it's calibration is off. I hope you are able to find a fix for yours. Keep us posted.

05-09-2024, 02:50 PM	#3
Gene F Senior Member Join Date: Mar 2012 Location: Ohio Posts: 2,010	Re: Temperature Gauge Issue I have had mixed results with the laser gun... Find a guy in your local club that has one of those thermometers you can drop in the radiator. Fill it up, and drop it in. Then compare the gage inside the car.

05-09-2024, 04:48 PM	#4
Banditorama Senior Member Join Date: May 2023 Posts: 162	Re: Temperature Gauge Issue Put the sensor end in a pot of boiling water and see what it reads. Should be 212f

05-10-2024, 08:59 AM	#6
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,498	Re: Temperature Gauge Issue Sponsored Links (Register now to hide all advertisements) The needle is stuck at 140F on my Rex-A-C0 gauge. I suspect that the line from the sensor probe to the gauge has an issue. More to follow. __________________ Bob Bidonde

05-10-2024, 09:25 AM	#7
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,071	Re: Temperature Gauge Issue Contact Rex-A-Co Alternately, here's a link on how to repair your gauge: https://www.jalopyjournal.com/forum/...ement.1043778/ __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!

05-10-2024, 05:40 PM	#8
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 7,553	Re: Temperature Gauge Issue I had one stop working a few years ago. I took it to my local instrument repair shop where they fixed it but it cost as much as a new one. My advice is "buy a new one". __________________ I'm part of the only ever generation with an analogue childhood and a digital adulthood.