Flathead temperature sender
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Cargo Master
Joined: Apr 2005
Posts: 3,337
Likes: 165
From: Harpswell Maine
Flathead temperature sender
I checked the for sale section without luck. Does anyone have a spare single contact temperature sender. They are the same many years including my 49. Please pm me if you do.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
1948/55 I-6 & V8 trucks / 1949/55 I-6 & V8 cars.
DC's 1948/56 truck catalog (2011 paper edition) shows it on page 45 for $55.00.
This may be NOS: MUSTANG SERVICE CENTER in North Hollywood CA has 1 = 818-765-9266 .. ask for Bo.
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Cargo Master
Joined: Apr 2005
Posts: 3,337
Likes: 165
From: Harpswell Maine
Problem on temp sensor resolved
As a follow up in case someone else has a similar condition.
Ross sent me a spare single post sender, thank you Ross. Unfortunately it was defective. I found another used sender which was good.
What was happening is that my original sender which came from Willard with a previous engine, a 56 nailhead Buick, tested fine however it would sometimes indicate a temperature excusion past where my test said the 212 degree point was. I have always stayed with stock gages. Willard is now powered by a 383 stroked sbc. I had the sensor installed in the intake manifold in a port right next to the thermostat. I decided to move it lower into a port in the head, same result. I started carrying an infared temp gun and could not find those kind of conditions with the gun. The current sensor indicates as it should with no overheat temperature indications. I am convinced that I never had a cooling problem but an instrument problem. It is curious that the sensor tested well but performance under operating conditions was at best sporatic. I always believe my insturments however it this case it was an instrument problem.
Ross sent me a spare single post sender, thank you Ross. Unfortunately it was defective. I found another used sender which was good.
What was happening is that my original sender which came from Willard with a previous engine, a 56 nailhead Buick, tested fine however it would sometimes indicate a temperature excusion past where my test said the 212 degree point was. I have always stayed with stock gages. Willard is now powered by a 383 stroked sbc. I had the sensor installed in the intake manifold in a port right next to the thermostat. I decided to move it lower into a port in the head, same result. I started carrying an infared temp gun and could not find those kind of conditions with the gun. The current sensor indicates as it should with no overheat temperature indications. I am convinced that I never had a cooling problem but an instrument problem. It is curious that the sensor tested well but performance under operating conditions was at best sporatic. I always believe my insturments however it this case it was an instrument problem.
Fleet Owner
Joined: Jul 2004
Posts: 27,283
Likes: 1,046
From: NM
I assume you are 12v? What kind of converter/Runtz/whatever are you using?
On my DD, the oil pressure sender/switch started leaking and I replaced it with a new OEM ($$) unit. My indicated OP dropped 1/2 Bar (7 psi) across the board. Point being, automotive instruments just aren't real high quality, certified instruments. Best for indicating trends. I can understand your concern tho, you can tell yourself, "It's not really that hot" but psychologically you'll always be wondering.
On my DD, the oil pressure sender/switch started leaking and I replaced it with a new OEM ($$) unit. My indicated OP dropped 1/2 Bar (7 psi) across the board. Point being, automotive instruments just aren't real high quality, certified instruments. Best for indicating trends. I can understand your concern tho, you can tell yourself, "It's not really that hot" but psychologically you'll always be wondering.
Logistics Pro
Joined: Sep 2014
Posts: 4,920
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From: Bothell & Silverdale, WA
True dat. I consider their readings nominal.
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Cargo Master
Joined: Apr 2005
Posts: 3,337
Likes: 165
From: Harpswell Maine
Ross,
I have individual dropping resistors that I installed on the 3 gauges shortly after I bought Willard in 1977. I measured the actual current flow using a 6v power supply and then purchased dropping resisters calculated to maintain the 6v for the gauges. Amazing that I still even remember!
I found in my heated pot of water test that the gauge does have good repeatability. The test gave me temperatures to go with the gauge markings.
I have individual dropping resistors that I installed on the 3 gauges shortly after I bought Willard in 1977. I measured the actual current flow using a 6v power supply and then purchased dropping resisters calculated to maintain the 6v for the gauges. Amazing that I still even remember!
I found in my heated pot of water test that the gauge does have good repeatability. The test gave me temperatures to go with the gauge markings.
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