Changing Thermostat

RR_Raptor · Jan 5, 2021

Badgertits said:
theoretically the coolant will start circulating @ a lower temp than stock amounting to overall lower engine temps, I wouldn’t bother w/ it personally on a DD truck, & I also feel like you would be able to accomplish the same thing w/ a tune, or maybe they can only control when rad fans come on....but the other thing I’d mention is I seem to remember members having issues w/ the SPD Tstat not fitting flush to the tank like OEM or not having as secure a fit & leaking or blowing out

should probably research that a bit....or not waste $$$ on one

Thanks!

buyrogue_TYH · Jan 5, 2021

Badgertits said:
theoretically the coolant will start circulating @ a lower temp than stock amounting to overall lower engine temps, I wouldn’t bother w/ it personally on a DD truck, & I also feel like you would be able to accomplish the same thing w/ a tune, or maybe they can only control when rad fans come on....but the other thing I’d mention is I seem to remember members having issues w/ the SPD Tstat not fitting flush to the tank like OEM or not having as secure a fit & leaking or blowing out

should probably research that a bit....or not waste $$$ on one

The issue with the SPD thermostat was related to the supplied gasket not creating that OEM seal. When I replaced mine, I just ordered a spare gasket from the local Ford Parts store (Thermostat gasket: HL3Z-8255-A) and used that based on the recommendation that you shouldn't reuse the original. To be honest, the original didn't look like it had that much wear and I was at 26K miles.

Syberspace · Jan 26, 2021

Badgertits said:
theoretically the coolant will start circulating @ a lower temp than stock amounting to overall lower engine temps, I wouldn’t bother w/ it personally on a DD truck, & I also feel like you would be able to accomplish the same thing w/ a tune, or maybe they can only control when rad fans come on....but the other thing I’d mention is I seem to remember members having issues w/ the SPD Tstat not fitting flush to the tank like OEM or not having as secure a fit & leaking or blowing out

should probably research that a bit....or not waste $$$ on one

The thermostat controls the temperature of the engine. You could add a very large fan and radiator... the temperature will not change if you don't change the tstat (under normal operating conditions... not towing a 8000# trailer up a mountain... then yes, the larger rad and fan will help). If you try to cool more with a fan, the thermostat will close and bring the temperature up (again, normal operating) If you want a lower engine temp, change the tstat to a lower value. Not commenting on benefit.

Therock88 · Dec 21, 2021

Just adding to an older discussion here in case others may be researching as well. Confirmed on my Gen 2 that the Thermostat is definitely 61 MM and 195 degrees. Added a photo for reference.

I just replaced mine yesterday with a 180 degree thermostat as it is now tuned and has Water/Methanol and other mods. Seems to be running cooler also! I did not go to the 170 degree as I live further north.

DC

Zeusmotorworks · Dec 21, 2021

Therock88 said:
Just adding to an older discussion here in case others may be researching as well. Confirmed on my Gen 2 that the Thermostat is definitely 61 MM and 195 degrees. Added a photo for reference.

I just replaced mine yesterday with a 180 degree thermostat as it is now tuned and has Water/Methanol and other mods. Seems to be running cooler also! I did not go to the 170 degree as I live further north.

DC

View attachment 333986

Who did you source the 180 from?

blwn · Dec 21, 2021

Zeusmotorworks said:
Who did you source the 180 from?

This is where I bought mine..

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

Therock88 · Dec 21, 2021

Zeusmotorworks said:
Who did you source the 180 from?

Hi...

I found mine at a local parts store. Motorad is an OE type supplier and the part # was/is 655-180. Nothing special and pretty inexpensive (like any other Themrostat). It fit perfectly and works as designed.

Good luck.
DC

Zeusmotorworks · Dec 21, 2021

Gotcha guys, thanks.

raiderofthelostark · Jan 25, 2022

I'll be adding a Mishimoto Radiator and 180 thermostat soon. Will report back results but think the radiator alone will be the biggest improvement.

We do these thermostats on a lot of racecars, especially with fan deletes. Don't see why it wouldn't help here

nikhsub1 · Jan 25, 2022

raiderofthelostark said:
I'll be adding a Mishimoto Radiator and 180 thermostat soon. Will report back results but think the radiator alone will be the biggest improvement.

We do these thermostats on a lot of racecars, especially with fan deletes. Don't see why it wouldn't help here

The truck doesn't need a radiator, it obviously doesn't hurt but not necessary. The thermostat is what makes the biggest difference.

Changing Thermostat

RR_Raptor

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buyrogue_TYH

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Syberspace

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Therock88

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Zeusmotorworks

Semi-retired, now just a happy grumpy old man!

blwn

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

Therock88

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Zeusmotorworks

Semi-retired, now just a happy grumpy old man!

raiderofthelostark

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nikhsub1

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