Thermostat Housing Replacement - Mercury Mountaineer 4.0L V6 / Ford Explorer V6

This video will show you how to replace the thermostat housing assembly on a 2010 Mercury Mountaineer with the 4.0L V6 engine. A leak had developed between the seam of the lower and upper thermostat assembly. Since the assembly is made out of plastic, I assumed the housing had failed or quite possibly just the housing seal. Since the new assembly was moderately priced and came with a new thermostat, the customer agreed to have the old assembly replaced. The Mountaineer engine is also used on Ford Explorer.
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Stant 15249 Thermostat/Water Outlet Assembly:
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[@andrewbudrick4783]

Thanks so much for the video. I also have a 2010 mercury mountaineer and I did exactly what you showed how to do and problem solved.

[@hardlymovingpro]

Great to hear!

[@PrestonCovell]

Very informative. About to tackle this on my explorer. Got all my parts.

[@hardlymovingpro]

Good luck with the repair!

[@jman6214]

If your Explorer was anything like mine, it would have taken a hell of a lot longer to do than this job. Mine was under the manifold, and under various wires and another hose. A pain in the butt to get to, and get out.

[@V.Hansen.]

@@jman6214 what year is yours?

[@jman6214]

@@V.Hansen. 2001

[@V.Hansen.]

@@jman6214 hmm. Mines 04. Wonder if it’s better or worse

[@joseandiel1586]

Make sure you’ll check it’s not the sensor that’s leaking first. This advice will save you money and time changing the whole thing. For some it’s the sensors o ring or the whole sensor and for other it’s the whole housing.

[@hardlymovingpro]

The housing is made out of cheap plastic and has a reputation on cracking and leaking. Better off replacing with a better made aftermarket replacement.

[@Str8Ac3gAming]

Getting a better housing with sensor is actually cheaper then getting another sensor itself. I upgraded to the aluminum house with sensor, it was only 30 bucks while the sensor itself was 22.

[@9500sasquatch]

​@@Str8Ac3gAmingwhere did you find a housing for $30? I just ordered one for $180

[@UtahDarkHorse]

Thanks for the super video! I'm getting ready to do this job.

[@hardlymovingpro]

You bet and good luck!

[@mortalgabsanchez1530]

Thanks for the information that help a lot !!! 😊

[@hardlymovingpro]

Glad it was helpful!

[@alanmorrison3598]

Drain coolant to avoid coolant getting on serpentine belt and everywhere else..

[@hardlymovingpro]

Thanks for sharing!

[@deowarrior]

Gran habilidad , los ingenieros de Ford tuvieron la brillante idea de poner ese cable justo encima del thermostat housing

[@hardlymovingpro]

Los ingenieros estadounidenses encuentran métodos económicos y fáciles para instalar componentes de automóviles en la fábrica. No les importa mucho facilitar el servicio de reparación.

[@NickAlexander_is_Awesome]

they make a nice upgraded metal thermostat housing now

[@hardlymovingpro]

Good for you!

[@staffordmcanuff8675]

Where can you find it?

[@NickAlexander_is_Awesome]

@@staffordmcanuff8675 I got mine from eBay

[@NickAlexander_is_Awesome]

@@staffordmcanuff8675 the metal thermostat housing is available on an online seller that starts with E and ends with Bay, or the very popular Jungle Site (named after a rainforest in Brazil, it starts with an A and sounds a bit like "Amazing" but not.) KZbin's Spam filter won't let me tell you the names of those sites.

[@dmiretti]

Great video, thanks

[@hardlymovingpro]

You bet!

[@bigpappy3660]

God help u if the bolts dont strip my thermostat bolts were stripped wou d up.replacing this unit

[@chrisz.9974]

Man, yours is easy lol. I’ve got an 02 Sport Trac. You need to split the housing in two to be able to fit it under the intake, or completely remove the intake to be able to fit it under. Mine is one whole piece like yours. I don’t want to separate it like most do in fear of breaking any water right seals and what not.

[@hardlymovingpro]

RTV silcone sealant is a good makeshift band aide for broken seals.

[@johndoe5247]

Is it easy to remove the thermostat from the housing and swap in a different thermostat ?

[@hardlymovingpro]

Yes it is. The problem is the housing is made of plastic and tends to form cracks.

[@johndoe5247]

5:30 -- how many inch pounds for those 10mm bolts ?

[@hardlymovingpro]

I hand torque with a 1/4" ratchet wrench.

[@TyRC12]

Does it matter where the little burp hole goes on the thermostat? Because you put it 1 way. As I have seen others. But have seen others before they take it out the burp hole is towards the back of the housing.

[@hardlymovingpro]

Do believe it matters.

[@TyRC12]

@Hardly Moving Productions I put it towards the back. Because I seen when others changed it before they took it out the burp hole was at the back. I successfully burped it last night. Most not matter horizontally.

[@bikdav]

If you know, is the rubber hose span between the heater connector and the thermostat housing the same size at both ends? That is what is intermittently leaking on mine.

[@hardlymovingpro]

Can't say. But with problem hoses that don't seal properly with various hose clamps, I apply a light coat of RTV on the hose contact surface. You should experience a leak free seal.

[@bikdav]

@@hardlymovingproOh. Maybe I'll try that. Thank you.

[@felixmmothatego8124]

Do you by any chance understand why there is a dashboard message "low oil Pressure"?

[@hardlymovingpro]

If your oil dip stick oil level is okay, it could be the oil pressure sending unit is malfunctioning. Otherwise, your oil pump is bad.

[@AlexBlaxican]

Any info on the torque specs for the 3 bolts?

[@hardlymovingpro]

under 10 lbs

[@jjose0013]

How much should I pay for this actual service?

[@hardlymovingpro]

Cost of part, coolant and 1 hour labor time.

[@jefferymeasles4193]

Where's the link to purchase?

[@hardlymovingpro]

Click on the "SHOW MORE" hyperlink in the text description of this video.

[@urs2nv2002]

Will this make my vehicle not start.i see it's cracked and leaking. Crank no start. Changes my could pack I'm stumped

[@urs2nv2002]

Was driving just died n won't start

[@hardlymovingpro]

Check your ignition relay and fuses as a starting point. Does the engine crank over?

[@urs2nv2002]

@@hardlymovingpro yes. It was mis firing . Not fuel pump.

[@urs2nv2002]

Gas milage went down recentley

[@therealbigfoot3076]

@@urs2nv2002 plugs or.coils?

[@truthfulteachingsautorepai5475]

I put black rtv silicone all over the housing . I can garuntee it will never ever leak again .

[@hardlymovingpro]

Ok ... good deal!

[@felixmmothatego8124]

I want to purchase the Thermostat housing, where can I order it?

[@hardlymovingpro]

I provided a product link in the "show more" text description of this video.

[@truthfulteachingsautorepai5475]

AutoZone has the whole assembly with the sensor just becareful though because when I bought mines it did not have the o ring

[@dangjr9972]

AutoZone Auto parts

[@davidmosleysr.5799]

I purchased mine from AutoZone but the sensor wasn’t included so I had to order the sensor separately, the other auto stores only sold half of the housing assembly.

[@911Privacy]

You removed the plastic and installed plastic ..! Why ? It would have been better to install aluminum. Better than plastic

[@hardlymovingpro]

If the replacement part was available in aluminum.

[@Arrozconchopsticks]

Dorman makes an aluminum version. Hate when companies cheap out on parts like this.

[@hardlymovingpro]

I agree.

[@bikdav]

Interesting. That is a bad design.

[@hardlymovingpro]

Cheap plastic.

[@bikdav]

Very poor design on Ford’s part.

[@hardlymovingpro]

I'd agree.

[@truthfulteachingsautorepai5475]

And I would not use that coolant for these Ford's . Use vc7bdil ford coolant.

[@hardlymovingpro]

Good to know.

[@truthfulteachingsautorepai5475]

@@hardlymovingpro you did a good job on your video though . Some guys remove the belt but that's stupid just cover it up with rags is what I would do as a matter a fact that's what I'm doing right now .

[@hardlymovingpro]

@@truthfulteachingsautorepai5475 Good advice.