My 170 degree thermostat install write up.

My 170 degree thermostat install write up.

This is a discussion on My 170 degree thermostat install write up. within the F150 Ecoboost Guides and How-Tos forums, part of the F150 Ecoboost Garage category; Finally had time to install my 170 degree thermostat in my 13' Ecoboost (This should work on 2011-2014 Ecoboosts). Here's a little write up that ...

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  1. #1
    Ecoboost Pro colinmitchell111's Avatar

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    Lightbulb HOW TO: Install 170° Thermostat

    Finally had time to install my 170 degree thermostat in my 13' Ecoboost (This should work on 2011-2014 Ecoboosts). Here's a little write up that might help some:
    Parts needed.
    1 - Gallon of Motorcraft ORANGE coolant concentrate
    1 - Gallon of distilled water
    1 - Reische Performance 170° Performance Thermostat
    Tools needed.
    8mm socket with ratchet and 6" or 9" extention
    Flat head screw driver for air intake clamps
    Drain pan
    Large Taco Bell cup
    With an extra clean empty gallon contanier, combine 1/2 the water and 1/2 the coolant. Mix the other half and you'll have 2 gallons of 50/50 coolant
    Remove coolant bottle cap
    Remove the air intake y pipe in the middle(3 hose clamps)
    Place large drain pan directly under the truck below the front of the engine
    Using the 8mm socket with extenion and ratchet loosen the 2 bolts on thermostat housing
    As it starts to leak coolant out hold Taco Bell cup under to catch most of the mess(your're going to make some mess regardless)
    Remove both bolts and remove old thermostat and the o ring
    Install new thermostat same way old one came out
    Replace bolts, don't over tighten(I was going to torque to spec but impossible to fit my torque wrench in at that angle)
    Pour in 1 gallon of your mixture
    Start truck, let idle, turn heat on full blast
    Check for leaks
    Squeeze both upper and lower radiatior hoses repeatedly to get air out
    Replace coolant cap
    Drive till full operating temperature
    Check for leaks
    Top off coolant
    I had a hard time getting the air out. I actually called Reische because I thought the thermostat was defective. They we're very helpful and helped me determine it was just air. If you have no heat and your temps are climbing past 210 degrees at idle like mine did you probably have an air pocket. Reving mine up to about 4k RPM and holding it along with squeezing the hoses did the trick. It's 30 degrees outside here. Now my temps are 180 cruising and it's hard to get past 195 beating on it. Before it would get past 200 just at an idle. I read some people only needed 1 gallon of coolant, I needed about 1 1/4 gallons, so don't buy 1 gallon of premix as it might not be enough. Hope this helps anyone that's getting ready to do this. It took me 30-40 minutes start to finish.
    Last edited by milesej05; 02-09-2019 at 04:18 PM.

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    Eco-Beast VolForLife's Avatar

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    Nice write up Colin. Thanks very much. I'm about to do this very thing and a Wagner CAC upgrade at the same time.

    Very helpful!!



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    2013 XLT 2WD Supercab EcoBoost - 3.31 E-Locker - Sterling Grey - chrome package ejected - mods in process using my HAL9000 super computer

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    Eco-Beast Raiderfan1890's Avatar

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    Sweet write up. I'm a out to do this too


    Boosting hard, boosting safe since 2013
    2013 Sterling Gray FX4 157", Appearance Package, Max Tow, 402a, 36 Gallon Tank, 103k miles.
    Mods: S&B intake, FR resonated exhaust, X4 with LET and MPT tunes, auxiliary backup lights.
    In garage: 170* tstat, AEM meth injection, FR CAC ( black anodized, red tial bov, throttle body spacer, meth bung), AMP powered steps, billet badges, aeroforce gauges w/vent pods.

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  5. #4
    Ecoboost Pro colinmitchell111's Avatar

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    Glad I could help.
    2013 Ecoboost SuperCrew 6.5' 4x4 XLT 3.31 E-Locker - 170 degree thermostat - RX monster can w/ clean side separator - S&B intake - Custom 3" cat-back with Flowmaster super 10 - AEM water/meth - JLP traction bars - SCT Livewire

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    Eco-Beast VolForLife's Avatar

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    Quote Originally Posted by colinmitchell111 View Post
    Glad I could help.
    But does it absolutely have to be a Taco Bell cup? Because that place always gives me explosive diarrhea....TMI I know....just sayin'.



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    Ecoboost Pro Teamfour's Avatar

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    Great writeup. What prompted you to want to lower the operating temp of the coolant?
    2016 F250 CC SB XLT 6.2 3.73 locker
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    Ecoboost Veteran taubr unit's Avatar

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    You read my mind. I was just about to look up ways people did this and BOOM here it is, lol. Thanks and seems very easy!
    Raiderfan1890 likes this.
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    Ecoboost Pro colinmitchell111's Avatar

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    Quote Originally Posted by Teamfour View Post
    Great writeup. What prompted you to want to lower the operating temp of the coolant?
    These things just run too damn hot. In this cold winter I've seen 215 degrees when running my truck hard WOT with just the canned SCT tune. I can only imagine when it's hot outside and a higher power tune how hot this thing would get.
    2013 Ecoboost SuperCrew 6.5' 4x4 XLT 3.31 E-Locker - 170 degree thermostat - RX monster can w/ clean side separator - S&B intake - Custom 3" cat-back with Flowmaster super 10 - AEM water/meth - JLP traction bars - SCT Livewire

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    Ecoboost Pro colinmitchell111's Avatar

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    Quote Originally Posted by VolForLife View Post
    But does it absolutely have to be a Taco Bell cup? Because that place always gives me explosive diarrhea....TMI I know....just sayin'.
    I could eat Taco Bell 24/7!
    mikemetz82 and EcoBoostDave like this.
    2013 Ecoboost SuperCrew 6.5' 4x4 XLT 3.31 E-Locker - 170 degree thermostat - RX monster can w/ clean side separator - S&B intake - Custom 3" cat-back with Flowmaster super 10 - AEM water/meth - JLP traction bars - SCT Livewire

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    Eco-Beast scap99's Avatar

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    Quote Originally Posted by colinmitchell111 View Post
    These things just run too damn hot. In this cold winter I've seen 215 degrees when running my truck hard WOT with just the canned SCT tune. I can only imagine when it's hot outside and a higher power tune how hot this thing would get.
    Don't ask....
    '13 FX4 3.55 LET Tuned
    Stock Turbos = 451hp/532tq

    58mm Turbos = 482hp/591tq

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