flathead oil pressure senders

[JM 35 Sedan]

OK Barners, here's what I have in my files. This was info I copied on Shelly's old Fordbarn. I assume it's correct but have not tried to purchase one. As ken Ct said, they may look a little different than an original Ford sender so they would not be show correct for EFV-8C/A judging on the show field.

Oil Pressure Sending Units:
The sending units were manufactured by King Sealy and have a KS logo stamped on the top. They made 50# units for Willy's, Kaiser, Packard, and others. Let you in on a secret, essentially the unit was the same 50# pressure unit. The difference from Ford was the thread that fits into the block. Ford used a larger thread. I have found the Willy's (PN 647571) and using an off the shelf adapter have been able to fit the sender into the Ford V-8 without affecting performance. Look for these on ebay or at a Jeep parts house or auto parts store.
FordBarn Post by Bill Worzek:
Kaiser Willy's Has the 50# senders...They have the 50# sending units, But like mentioned below smaller thread so a adapter is needed for Ford application. The Part is made in the U.S.A. by Crown the part # is 3212004 You can contact them At: [email protected] Another good supplier JMO

[f1builder]

thanks to all who responded, it has been very interesting and informative.

[Kube]

Originally Posted by ken ct

Does anyone know this second statement by 38 is definately correct were some 50's NOT marked?? ken ct.

Ken,
Ford started marking '50' on units nearing the war years to differentiate the "new" 80# units from the earlier 50# units. Before that only 50# units were utilized and manufactured so there was simply no need to differentiate them.

The sending unit must be matched with the dash gauge in order to read accurately.

KS is in fact King-Seeley, the manufacturer's trademark.

[Ray With]

Well from reading all the post the correct units are available and I would think with using a radio shack resistor you could make the 80# work with a correct gauge reading. Just my thoughts.

[34flathead]

here is on on ebay today and it has the part # referencing the old # 3212004, ebay item 160554846227
rich

[34flathead]

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another one NOS ebay item 270133513322
rich
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[ford38v8]

Hey now! Renault, you say? Not helpful at all. :/

[DD931]

OK, you got me interested. I checked the barn and found two sensors. One is marked with a "Script" F followed by -80. It also has a "Script" F followed by 1-8. The 80 I can understand. But the 1-8? It also has an arrow marking "UP". First time I ever noticed that there was an "UP"!!

I also have one marked KS in a circle which I assume is King Seeley. Does anyone know what the "9" under the KS indicates? Those are the only markings except the "UP" arrow.

I'm sure I have a 50# unit on my 48 F-1 because I get a full scale reading (no numbers) most of the time, rather that just above half which would be expected. Time for a change with the one just described!

Norm

[Bruce in southern OH]

I want to Thank JON ANDERSON for his help with the 1935 oil pressure gauge and his time and effort. Today I removed the rubber floor mat, gas pedal linkage, clutch pedal foot pad, brake pedal foot pad, screws the hold floor board down, and then I could reach the oil pressure sending unit, tried a NOS sending unit that again would not make sending unit work. Looked up the search on Fordbarn and found this old thread, exactly what I was looking for, traveled to NAPA and they crossed over the Crown # and I got a ECH Oil Pressure gauge switch # OP6603 and one 1/4 to 3/8 inch brass fitting, drove home and installed, works like new, 30 PSI at an idle, ( checked with my Air Compressor gauge installed in flathead block ) Again the fordbarn came to the rescue, thanks for all the information, Thanks JON
( will start the re-installation of floor mat, etc this evening )

[oldford2]

Since the sender is a bugger to get in and out, I put a 5" long 3/8 pipe nipple in the block where the sender is located and then with a 3/8 pipe coupler mounted my sender. Now it is up where it can be taken off easily. Now, attach a mechanical pressure gauge on the nipple and read what the actual pressure is at idle (maybe very low) and then at say 1500 rpm. Now put whatever sender you have and read what the dash gauge says at those rpm's. So now you will know how to interpret the dash reading vs the actual pressure. Clear as mud??
John

[34flathead]

Bruce, glad it worked out for you, but i searched napa and the part # ECH OP6603 discription is for a 100 psi oil sender.
rich

[Bruce in southern OH]

I know, but that is the cross over for the Crown # that is listed above, now either I have very good oil pressure or whom ever listed the Crown # knows something I do not, it reads on the stock gauge the same as what the Mechanical gauge did with in a couple of pounds, go figure???? I know that now when I start the motor, the little oil pressure needle slowly makes it way up the gauge, THAT'S GREAT! as Tony the Tiger says. Tell me more if you can explain, just glad to have a working gauge. NOW, I need to get a working 36 gauge that I installed in the same dual gauge, ( oil pressure and fuel share gauge ) I installed a 36 fuel gauge which is electric, I need to look up how to install a 36 sending unit in a 35 tank, told I need to change tanks, thanks again Bruce