Ford quietly redesigned the thermostat in 2022...replace it

[zak99b5]

Did you buy your 180F thermostat from ebay?

OEM FORD MOTORCRAFT 61MM 180° F COOLANT THERMOSTAT BR3E-8575-BB 7L3Z-8575-D | eBay

You will receive exactly what is photoed.

www.ebay.com

I don’t remember exactly where I bought it, but it was not on eBay. Thinking Rock Auto or Amazon?. It's a Motorcraft part.

 

[zak99b5]

that new thermostat has a plastic valve ? huh.

Yes. Original is a brass piece. Comparing the two before I installed the new one, I noticed the plastic tail piece slid smoothly. The brass piece would bind sometimes. Not sure if that was causing my higher temps (and warning on dash), but it makes sense.

 

[zak99b5]

Did you buy your 180F thermostat from ebay?

OEM FORD MOTORCRAFT 61MM 180° F COOLANT THERMOSTAT BR3E-8575-BB 7L3Z-8575-D | eBay

You will receive exactly what is photoed.

www.ebay.com

Just looked at the link you provided—I would not buy that thermostat. It’s got the brass tail piece, which on my original one would bind, causing temps to rise.

Looked in my Amazon history, and there it was. Part number is RT1258, $24.

 

[Hellwig]

Just looked at the link you provided—I would not buy that thermostat. It’s got the brass tail piece, which on my original one would bind, causing temps to rise.

Looked in my Amazon history, and there it was. Part number is RT1258, $24.

Thank you very much for your guidance! Rockauto lists RT1258 as 190F. But the temp number printed on the thermostat clearly shows 82c, which is equal to 180F. Excellent!

 

[GlennSullivan]

Looks like the new style (black bottom) thermostat for 2017 model year 3.5 is RT1255

https://parts.ford.com/shop/SearchDisplay?catalogId=251&langId=-1&storeId=1405&dealerId=22272&krypto=esAikIj%2BxmSSet3gm54QKFIUZeotxHtIRc0GRpKcvV5poFdSRIbnFchOwM7mEHJcfSrbvjoHAtSJ9I%2F9YTueBJ%2F%2BKTheqkCkGd9uDNxMWxAsEqGHk%2FDJ50MP2xyxz2nNAkY1dBHfhHjtBo0MIl8YEsEJTk6jg6JnNh3dmz6tEqfgCNTwUIOJll5kVOhkTMNnTGws90nlkTLfZ%2FlGLGiP1wVqMkvDSK%2FKqcwknix0BWo%3D#facet:&productBeginIndex:0&orderBy:&pageView:&minPrice:&maxPrice:&pageSize:&

 

[wpaul]

Hello all, new to the forum. Regarding this thermostat discussion, would a jet low temperature thermostat be a good option versus the Ford factory part?

 

[Mr Big]

Hello all, new to the forum. Regarding this thermostat discussion, would a jet low temperature thermostat be a good option versus the Ford factory part?

I would always stay with authorized parts, unless you are out of both warranties. But there are many good after market parts available, as well as many bad ones.

 

[apex96]

Hello all, new to the forum. Regarding this thermostat discussion, would a jet low temperature thermostat be a good option versus the Ford factory part?

I run a ford 170 thermostat in mine, keeps trans temp around 165-170 for highway. City driving will see the trans run around 170-175. Thermostat temps range between 165-195 (165 is in down hill sections where I’m coasting and the 195 is when I come off the throttle and it spikes briefly before cooling off rapidly) during mountain driving where the engine is using a lot of boost. Engine coolant typically stays around 180-185 on relatively level ground.

On any thermostat you’ll find that where the temp sensor is, it will read about 10 degrees hotter than the number stamped on the thermostat. The trans will read almost dead-on what the thermostat is rated at.

 

[Polo08816]

I run a ford 170 thermostat in mine, keeps trans temp around 165-170 for highway. City driving will see the trans run around 170-175. Thermostat temps range between 165-195 (165 is in down hill sections where I’m coasting and the 195 is when I come off the throttle and it spikes briefly before cooling off rapidly) during mountain driving where the engine is using a lot of boost. Engine coolant typically stays around 180-185 on relatively level ground.

On any thermostat you’ll find that where the temp sensor is, it will read about 10 degrees hotter than the number stamped on the thermostat. The trans will read almost dead-on what the thermostat is rated at.

What's the Ford part number for the 170 thermostat?

 

[BMW2FORD]

I live up North and went with the improved version but in a 180 degree temp. Part number is BR3E-8575-BB. Trans runs around 185-190 and the engine stays at about 190-195 with this t stat temp. On hard pulls on warm days it will cross to about 205-210 but return back down after the load is lessened. Reason I went with the 180 was for heat in the winter. It’s got plenty even with this temp and couldn’t be happier. I almost think a 170 would be fine as well even for me in the North.