Thermostat

[jacob smith]

I have 2 different manufactures after market nos thermostat one opens at 180 the other 175. Is it ok to use the in together in my 36 ford

[JSeery]

Well, as a data point a lot of flatheads run at different temperatures side to side anyway!

[Seth Swoboda]

Originally Posted by JSeery

Well, as a data point a lot of flatheads run at different temperatures side to side anyway!

That is correct. I know from personal experience that the thermostats on any of our flatheads do not open up at the same time (side to side).

[jacob smith]

Good point did not think of it that way

[Blu Dice]

I've had 3 pair fail after a short time, so I removed the guts of the last pair - of course the motor doesn't heat up as it should now and it gets pretty cold here. I try to drive my car as much as possible, but like today it's just too cold - who's makes the best thermostat now days? I've got Auto Zone, O'Reilly, Advance Auto, NAPA, and a couple of local stores to choose from.

[G.M.]

Sponsored Links (Register now to hide all advertisements)

Originally Posted by Blu Dice

I've had 3 pair fail after a short time, so I removed the guts of the last pair - of course the motor doesn't heat up as it should now and it gets pretty cold here. I try to drive my car as much as possible, but like today it's just too cold - who's makes the best thermostat now days? I've got Auto Zone, O'Reilly, Advance Auto, NAPA, and a couple of local stores to choose from.

Contact Bob Shewman he makes the best stats for in the hoses and for the later gooseneck engines. He uses the old Robertshaw type and modifies them.
His stats have very little restriction and provide almost a full flow of coolant.
Contact Bob by phone 1-610-933-6637 or [email protected] G.M.

[Old Henry]

The best thermostat that I have found for the 59A engine is the Stant 14157 thermostat sold on Amazon here: http://www.amazon.com/Stant-14157-Th...157+thermostat

Here are the studies I did to reach that conclusion:

Comparing Stant thermostats to the modern replacements: https://www.fordbarn.com/forum/showth...=113366&page=2

Comparing Stant thermostats to Shewman's thermostat: https://www.fordbarn.com/forum/showthread.php?t=143576

NAPA also sells as part number THM 111, O'Reilly sells as a Murray 4157, O'Reilly part number 2962.

[jacob smith]

Originally Posted by Old Henry

The best thermostat for the 59A engine is the Stant 14157 thermostat sold on Amazon here: http://www.amazon.com/Stant-14157-Th...157+thermostat

Here are the studies to prove it:

Comparing Stant thermostats to the modern replacements: https://www.fordbarn.com/forum/showth...=113366&page=2

Comparing Stant thermostats to Shewman's thermostat: https://www.fordbarn.com/forum/showthread.php?t=143576
G
NAPA also sells as part number THM 111, O'Reilly sells as a Murray 4157, O'Reilly part number 2962.

Old Henry

Any idea what thermostat are best for the 32 to 36 flatheads. I have been buying NOS thermostat for my 36 but the cost is high

[Old Henry]

Originally Posted by jacob smith

Old Henry

Any idea what thermostat are best for the 32 to 36 flatheads. I have been buying NOS thermostat for my 36 but the cost is high

I know of no modern replacements for the in-hose thermostats used in the 32-36. Fortunately, I see that stock NOS ones are still available on eBay. I don't think Ford's bellows and flap mechanism has ever been improved upon. If you can get a pair that works right (tested before installation) I think you've struck it rich. I certainly would not recommend Shewman's stats in any hose. Here's why: https://www.fordbarn.com/forum/showthread.php?t=112889 starting at post # 85.

[sidevalve8ba]

"who's makes the best thermostat now days? I've got Auto Zone, O'Reilly, Advance Auto, NAPA, and a couple of local stores to choose from."

I used to think that Robertshaw and Stant made the best thermostats but I understand Robertshaw is out of the business and I am not sure about the quality of the Stant product at the present time. Seems like so many of the brands I used to rely upon have changed quality-wise.

[19Fordy]

Just as a side note. Here's some interesting thermostat info. from the 49-51 Mercury Manuals. Notice when they start to open and when they are fully open. Click on photo to enlarge.

[Blu Dice]

The last set I put in were Stants - failed miserably.

[Darrell S]

I just installed new water pumps and hoses on my 48. I ordered the new thermostats as I figured it was time for a replacement. Old Henry recommended the Napa THM111 170 degree thermostats so I installed them instead of the ones that came from C&G. Everything is buttoned up and running now, all seems well. I hope they continue to work.

Interesting point about the old ones I took out. The car is a Canadian build, came to the states in 1970. The previous owner who bought the car in 1970 from Canada had
Sears rebuild the engine then and it hasn't been torn down since. Anyway the thermostats I took out say SF Canada on them and are 160 degrees. It appears they were reinstalled when the rebuilt engine was put in. I checked them on the stove with a thermometer and they start opening around 150 and are all the way open at 160. I"d say that is pretty darned good for parts that old. I'm keeping them for spares in case the new ones fail.

[flatford8]

Well said..... My casket is going to have two 94's nailed to the top of it..... And blackwalls on the side... Mark

[qickkenny]

Hi Guys, can we talk 1939 60 HP thermostats. I have looked in Macs catalog, and they sell them. Just wondering if anyone has used Macs thermostats?

[Drbrown]

I have Stant's and they work fine. Tested before installation, they both opened at the same apparent temperature.

Personally, I would not be concerned about installing a pair of thermostats that differ in manufacturer and are tested to confirm that they open within 5 or 7 degree difference.

[JM 35 Sedan]

Originally Posted by qickkenny

Hi Guys, can we talk 1939 60 HP thermostats. I have looked in Macs catalog, and they sell them. Just wondering if anyone has used Macs thermostats?

Hi Kenny, if you need thermostats for your '39 with 60hp, I may be able to help you when I get back.
Hopefully, some of the guys with 60 HP engines in their '37 to '40 vehicles can post some technical info on what their experience is and what they use.

[qickkenny]

Thank you Craig, and Drbrown. John, call me when you can please.

[JM 35 Sedan]

Originally Posted by qickkenny

Thank you Craig, and Drbrown. John, call me when you can please.

Will do Kenny. I tried to send you an email but I believe I have the wrong address on my contact list and the message bounced back.