I bought a 59 F100 pick up it has a rebuilt 312? in it iam trying to find out the thermostat size & temp for it. i am going to be making a road trip from ca to wis. will be mounting the temp sender in the side of the block where pitcock is located ( auxilliary Gauge) Any info on this would be appreciated. oh by the way the temp sender right know is mounted right behind the upper large radiator hose in a tee with the heater hose is this a good location right now im not getting a reading so i think there is not a thermostat in it also read on the instructions not to mount in a tee cause you will not get a reading?? i am getting good heat from heater. i just want to make sure i can monitor motor temp. i have the other gauges installed but not fully connected i e oilpressure volts i will also be trying to get engine #'s Thanks again for the help

 

Howdy,

You can easily buy a T-stat from NAPA, Oreilly, Autozone etc.

It will be the same as one for a 272/292 F-series Ford etc, from about 55-63 or so.

A 7psi cap is common, so 180 degrees is about where you want to be.


Regards,


Rick

 

The easiest place to install the sender will be in the stock location at the back of the driver side head, just behind the intake manifold.

Is the sender currently in the line to the heater or the one from the heater? The line from the heater will not provide an accurate reading as the coolant in that line has been cooled while passing through the heater core. The line to the heater will provide an accurate reading, assuming that coolant is passing through that hose. If the instructions say not to install it in a T, then it probably won't work. The gauge manufacturer should know more about their gauge than anyone else.

 

Thanks i will see if i can see what your talking about in the morning should be a plug cap im looking for correct.

 

I could be capped off by now but I think you'll most likely see the old sender, or the remains of a sender.

 

ok thanks charlie the engine was rebuilt so like you said could be capped off cause the original gauge didnt work i will let you know if i find it if not i can put it in place of the pitcock on the drivers side for draining the block correct??

 

You can see it in this picture, just below the throttle return spring bracket.



The side of the block really is not the best place because the coolant will not be completely heated. At that point, it will have made about 1/4 of it's journey through the water jacket. The stock location is a good compromise. The best place is in the intake, just before the thermostat but that will require drilling and tapping a new hole.

 

ok now that helps nothing like seeing is believing. thats were i thought you were talking about. thanks for the visual.

 

Ok charlie i found the plug but it looks like a freeze plug & it looks like one of the old style that you push the sender in & bolt it down with the flat c opening brackets that use a single bolt am i correct i do not want to pull the plug & find out its not threaded & have no way to get to the parts store as this is my only vehicle or is there a way to get the plug out with a self tapping screw down the center that way worse case scenario can tap plug back in & plug the hole with a screw & gasket sealer. what do ya think??

 

If it is a core plug, then you will not be able to install a sender. Stock, it used a bushing which is pressed into the head and threaded, a 1/4" pipe thread if I'm not mistaken.
It looks like Dennis Carpenter has some.
You should see if you can determine the size of the core plug to ensure that the bushing will fit. I think most likely the original got stripped, in which case, I would not suspect any problems. Another possibility is that head started life on the passenger side of some engine. To install it on the driver side, the core plug had to be removed and a new one installed on the opposite side. In this scenario, the passage could have been corroded and needed machining to fit the plug - an oversized plug - or it could be the stock diameter, in which case you should be fine.

 

Iwas just thinking charlie the way the sender was mounted is off the water hose on top of the intake behind the large upper radiator hose with control valve to the heater core the Tee is mounted like this T if i turn it half a turn & the sender is on top aiming in a straight line down with the inlet & the water shooting off to the side heat rises & the flow should hit the sensor enough to give me a reading what do ya think i will need some more time to do it in the plug in the back of the head im kinda under the gun & on tight budget with moving & all just trying to have a good monitor on things Thanks for all your help in this matter i appreciate it

 

You can try it. If that doesn't work, try the side of the block. It will read lower than normal but as long as it reads something, you should be able to tell if you're running into trouble during the trip.

 

The temperature sending unit threads into an adapter (noted in Post #10) that threads into the head.

C3AZ10911A .. Adapter-Temperature Sending Unit-Screw in type (Motorcraft SW347) / Obsolete

1/4" -18 external pipe thread x 1/8" -27 internal pipe thread.

CARPENTER NOS OBSOLETE PARTS in Concord NC has ONE = 704-786-8139.

PARTS INTERNATIONAL in Farmers Branch TX has ONE = 888-727-0418.

KINSEL L/M in Beaumont TX has ONE = 800-816-2894.

SHARP MOTOR CO. in Pulaski TN has ONE = 931-363-2533.

GREEN SALES CO. in Cincinnati OH has TWO = 800-543-4959.

JST AUTOMOTIVE in Lebanon TN has THREE = 615-443-3086.
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The 2 1/2" (flange) O.D. thermostats were used on 215/223/262 I-6's / 239/256/272/292/312's thru 1964, and on 352/390/406/427's thru 1966.

NAPA does have these, but they may not be listed on their computer...so the partsguy has to look in the paper parts catalog to find them.

There were there different heat ranges available: 140, 160 and 180 degrees.

These t/stats can also be found at a few Ford Dealers, obsolete parts vendors.

 

Thanks Charlie i will try that & see & thanks for the info numberi also found one at autozone but its gotta come from the warehouse. So thanks for all the help from the Both of you I appreciate it.

 

That is incorrect, the temperature sending adaptor is PRESSED into the head not THREADED. There are not any threads in a Y-Block head in that location (any I have seen anyway).

The sending unit does thread into the adaptor as NumberDummy stated.
There are two adaptors available that have different thread sizes for the two different thread sizes of the sending units. make sure you get the size adaptor for your gauge. Most after market gauge kits come with different size fittings.