Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 07-31-2020, 12:16 PM   #1
drolston
Senior Member
 
drolston's Avatar
 
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,038
Default Temperature Sender

My temp gauge reads about one increment high. When the water temp (measured by temp gun) is at 160 (should be the center mark) it reads 180 (the mark half way from center to the Hot mark).

The gauge seems okay. It buries on the hot side when open circuit, and buries to the cold side if the sender wire is briefly shorted to ground.

The right side (single connection) sender is a reproduction. I can not find a NOS or used original unit.

Is there a source for OEM senders?
Is it worth $45 to try a new repro sender? If so, are they all the same, or is there a better quality supplier?
drolston is offline   Reply With Quote
Old 07-31-2020, 12:59 PM   #2
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 6,611
Default Re: Temperature Sender

I would try Fred at Southside Obsolete (barnfind08 on here); he seems to have more NOS stuff than just about anyone. I have heard the repop senders aren't very accurate and are also short-lived. I might have a good used one in my stash if all else fails.
tubman is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-31-2020, 01:13 PM   #3
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 8,131
Default Re: Temperature Sender

Go with what your temp gun reads and then recalibrate the gauge reading in your mind.
Over time the bimetallic heat strips inside the sender and the gauge may wear out just a little and not give perfectly accurate readings. Plus all temp sending units in the heads are not calibrated the same. So, a replacement may vary the readings.
19Fordy is offline   Reply With Quote
Old 07-31-2020, 01:25 PM   #4
Ross F-1
Senior Member
 
Ross F-1's Avatar
 
Join Date: Nov 2010
Location: NM
Posts: 2,271
Default Re: Temperature Sender

I don't know about the earlier gauges, but 48-on can be adjusted. Adjustments must be VERY small or the gauge will go crazy. One adjusts Zero, the other readings. According to the 48-51 Truck manual, you calibrate by connecting the gauge to a D-cell battery and adjust til it shows 50% of range.
Attached Images
File Type: jpg Oil pressure gauge-inside-arrow.JPG (23.6 KB, 13 views)
__________________
'52 F-1, EAB flathead
Ross F-1 is offline   Reply With Quote
Old 07-31-2020, 07:14 PM   #5
Ggmac
Senior Member
 
Join Date: Jul 2016
Location: Lake worth Florida
Posts: 554
Default Re: Temperature Sender

1980 ford gauges are near identical , more plastic but look the same . I remember osing the guts of a 80s ford something to repair a 46 or 48 ford gauge . Worked great . The 80 ford gauge cluster had a bi metal strip thing with the connections of 9 v transistor battery .
Ive got some already disassembled somewhere .
Ggmac is offline   Reply With Quote
Old 07-31-2020, 07:19 PM   #6
paul2748
Senior Member
 
paul2748's Avatar
 
Join Date: May 2010
Location: Midland Park, NJ
Posts: 2,796
Default Re: Temperature Sender

Go with 91fordy's advice. Since you know that 160 is really 180, that is your standard. Any variation of what it normally reads can be checked out.



I do the same with the temp gauge on my 54. Usual reading is about 3/4 towards cold. If it differs significantly from that I start checking things.
__________________
48 Ford Conv
56 Tbird
54 Ford Victoria
paul2748 is offline   Reply With Quote
Old 07-31-2020, 10:37 PM   #7
drolston
Senior Member
 
drolston's Avatar
 
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,038
Default Re: Temperature Sender

Quote:
Originally Posted by paul2748 View Post
Go with 91fordy's advice. Since you know that 160 is really 180, that is your standard. Any variation of what it normally reads can be checked out.



I do the same with the temp gauge on my 54. Usual reading is about 3/4 towards cold. If it differs significantly from that I start checking things.
Yeah, I get that, but ..... If the gauge were biased toward cold, I would be fine with it. But it is biased toward hot, so when the needle gets to the hot mark, the temp is really about 190, which is expected on a long climb on a hot day. But then it heads off scale and I don't know if the temp is 200 or boiling over.

For that reason, I want a fix.
drolston is offline   Reply With Quote
Old 07-31-2020, 10:40 PM   #8
drolston
Senior Member
 
drolston's Avatar
 
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,038
Default Re: Temperature Sender

Quote:
Originally Posted by Ross F-1 View Post
I don't know about the earlier gauges, but 48-on can be adjusted. Adjustments must be VERY small or the gauge will go crazy. One adjusts Zero, the other readings. According to the 48-51 Truck manual, you calibrate by connecting the gauge to a D-cell battery and adjust til it shows 50% of range.
Can that adjustment be made from the back of the instrument, or do you have to remove and disassemble?
drolston is offline   Reply With Quote
Old 07-31-2020, 11:42 PM   #9
aussie merc
Senior Member
 
aussie merc's Avatar
 
Join Date: Sep 2016
Location: sydney australia
Posts: 326
Default Re: Temperature Sender

gauges are notorious for being off so long as their consistent you can work with them some manufactures dont put numbers on them just zones [yellow green red etc ] so long as it stays around the same point its good what you look for is a sudden change
aussie merc is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 09:10 PM.