Thermostat Housing Leak - Mustang Evolution

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Old 09-22-2014, 05:36 PM   #1
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Thermostat Housing Leak

ATTENTION: it has come my attention that the thermostat housing in our 4.0s is made out of plastic. I was changing my oil today and discovered that mine is leaking coolant and I had no coolant at all in the reservoir. Everybody just take a quick look at your housing to keep yourself from headaches down the road. Click image for larger version

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ID:	166685 not sure if yall can see the dried coolant but that's the best picture I could get
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Old 09-22-2014, 05:38 PM   #2
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Haha yep thst basically guaranteed to happen once you pass 60k miles. Happened to me at 61k, be sure to get a revised housing that's stronger


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Old 09-22-2014, 05:45 PM   #3
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Any suggestions? Where did you get yours?
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Old 09-22-2014, 05:47 PM   #4
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It was a couple years ago, my dad got it but I know he got a revised one. I know AM carries it


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Old 09-22-2014, 09:12 PM   #5
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Gotcha, sounds like I've got a good excuse to work on my car this weekend lol
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Old 09-22-2014, 11:04 PM   #6
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Haha always love those weekends


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Old 09-23-2014, 06:03 AM   #7
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If you search on Amazon there is a guy selling aluminum housings to replace the plastic one. Cost is a little more, but life expectancy is greater.

It is just a luck of the draw how long a plastic one lasts. I know people who replaced it twice in 60,000 miles. Mine lasted for 199,881 miles before it let go.
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Old 09-24-2014, 03:39 PM   #8
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I just got mine replaced at 121000 all one piece so I told the shop do it I have work in the morning and had no time to do it myself. It was pricy 530.buck I probably got ripped off. But at least it's off the to do list.


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Old 09-24-2014, 03:51 PM   #9
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Mine went out at 78K.
Guaranteed to happen in the 4.0's.
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Old 09-24-2014, 03:57 PM   #10
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Yeah mine went out at 45k hahah $400 later...


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Old 09-24-2014, 06:16 PM   #11
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My just went out today on my way home from work

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Old 09-24-2014, 08:30 PM   #12
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Thanks a lot ford! After I replaced mine my car has been running great, no more problems as of now
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Old 09-24-2014, 08:36 PM   #13
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Texas how much did it cost for ir replacement part

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Old 09-24-2014, 09:07 PM   #14
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New housing(plastic)- $70
New thermostat- $35
Antifreeze- $30
Came out to a total of like $150 cause I had to get a new socket as well
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Old 09-24-2014, 09:08 PM   #15
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I got a quote of $285 at a Kwik Kar, but I wasn't about to pay an extra $150 for labor lol
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Old 09-24-2014, 09:35 PM   #16
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Be sure to not let the little clip holding the thermostat sensor in the housing fly off into the engine bay somewhere never to be found.....that being said I improvised a paperclip and some jb weld haha


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Old 09-24-2014, 09:42 PM   #17
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i had to get the whole new houseing it cost me 65

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Old 09-24-2014, 11:33 PM   #18
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I thought install was pretty straight forward, good luck with it!
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Old 09-25-2014, 11:41 AM   #19
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Yeah, install wasn't too bad. Now wait until your harmonic balancer gives up and flies around in your lower engine bay.
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Old 09-25-2014, 12:31 PM   #20
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That's not nearly as common though haha


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Old 09-25-2014, 01:28 PM   #21
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Just rolled over to 54,000 this morning, any problems I should be expecting soon?
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Old 09-25-2014, 02:40 PM   #22
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No but my harmonic balancer broke a month ago and tore up a bunch of thing in my engine bay

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Old 09-25-2014, 04:33 PM   #23
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Quote:
Originally Posted by 07mustangtommy View Post
No but my harmonic balancer broke a month ago and tore up a bunch of thing in my engine bay

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Haha my point proven
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Old 09-25-2014, 06:13 PM   #24
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My mechanic said out of the 32 yrs hes never seen that happen

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Old 10-04-2014, 06:51 PM   #25
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Happened to me few months ago...Nothing like a smoking car going down south beach turning heads for he wrong reason.. Ha


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Old 10-04-2014, 07:25 PM   #26
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Happened to me few months ago...Nothing like a smoking car going down south beach turning heads for he wrong reason.. Ha


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Damn that's unfortunate but funny haha.

Mine went out a few years back after installing halo headlights and fog lights. My first thought was "Sh*t, my dumbass self doesn't even know how to wire simple halo lights right, must of caught something on fire!" Wasn't the case. I know longer have that car though.
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Old 10-04-2014, 07:36 PM   #27
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Haha installing Fog lights and somehow messing up the thermostat ...
I can't even imagine the connection.

I think Engineers at Ford were probably drunk when they decided to made that piece out of plastic.


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Old 10-05-2014, 12:03 PM   #28
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Haha installing Fog lights and somehow messing up the thermostat ...
I can't even imagine the connection.

I think Engineers at Ford were probably drunk when they decided to made that piece out of plastic.


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I mean at first I thought I just wired something wrong and the wires caught fire or something (because smoke was coming out of the engine bay, it was also at night and I didn't know the smell of coolant either at the time haha). After I got the car home my dad told me it was the thermostat housing. I didn't know much ab cars back then.
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