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EFV-8 Club Forum / General Ford Discussion / Themostats

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sarahcecelia

07-09-2021 @ 11:35 AM

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That's not TRUE!! A 180 thermostat STARTS TO OPEN at "about 172-173," and is FULLY OPEN at 180! If you want the real spec on when it starts to open, I have it in my Factory notes in the rear garage on the back of my property, and I'll get it and message it to all on this site. If it didn't start to open until 180, it would ot be fully open until about 184 - 186- not good in my book, or the car companies, or the car owner either!

Regards, Steve Lee

sarahcecelia

07-09-2021 @ 11:36 AM

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FORD MANUAL says use 160's.

Regards, Steve Lee

sarahcecelia

07-09-2021 @ 11:43 AM

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That's very unusual that it runs at 160; what were you using to find that out?I use a "Candy Thermometer" in the top of the radiator with the cap off to get my readings; they are very accurate,( Candy thermometers) and ACCURACY IS EXTREMELY IMPORTANT WHEN YOU DO THIS!!

Regards, Steve Lee

TomO

07-10-2021 @ 8:39 AM

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Incorrect post

This message was edited by TomO on 7-10-21 @ 8:39 AM

supereal

07-10-2021 @ 9:30 AM

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I wasn't writing about calibrating the stats, just to be sure that they both operate correctly, and in the range stated. It is not rare to find one or the other of the thermostats that doesn't open completely, causing overheating. In the 70+ years I have been working on old cars, I have seen plenty of them.

wmsteed

07-10-2021 @ 10:55 AM

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I have always found the comments, pros/cons regarding thermostats/coolant to be very interesting, especially since most of the comments are based on myths in lieu of facts.
I went through a mechanics school in the early '50's, I can clearly recall the session about cooling and optimum operating temp's. The optimum operating temp was 180 degrees.
I can clearly recall the common practice during the late '40's, early 50's that removed the thermostats and anti-freeze in the spring, then replaced same in the fall. Of course the early forms of anti-freeze contained alcohol, which boils at 180, water boils at 212, therefore alcohol was not a good thing in the summer months.
The object of a thermostat is to maintain a constant temp, thereby maintaining optimum performance of the engine.
I could relate to "Supers" comment about checking thermostats in a pan of water with a thermometer, the first time I tried that in a shop I had recently gone to work in almost got me fired.

Bill
36 5 win delx cpe

mfirth

07-11-2021 @ 5:37 AM

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180s made both of my 8BAs run at 180 to 190 in 80 degree weather. Never boiled or overheated.

1931 Flamingo

07-11-2021 @ 11:41 AM

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Once the t/stat opens at either 160 or 180 it is the radiator that maintains that temp, if it gets below 160 or 180 the stats close and then the process starts all over. The radiator and block need to be clean for this to occur. JMO
Paul in CT

dean333

07-18-2021 @ 11:01 AM

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Do stats tend to move if they are set in the head outlet of a 59AB rather than up at the top of the hose?

TIM CARLIG

len47merc

07-19-2021 @ 4:47 AM

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dean333 - given the construction of the new radiator hoses you are correct, thermostats tend to 'cant' in the hoses.

See the below links on this. If judging/scoring is not a concern then supereal's comment in the first link is the easiest solution. If judging/scoring is a concern then note my (len47merc's) comments on an proven solution that will not compromise judging results in the second link from 7 years ago - still working to this day:

https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=16&Topic=7003&keywords=thermostat

https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=16&Topic=7429&keywords=stat

Steve

This message was edited by len47merc on 7-19-21 @ 4:49 AM

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