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  #1  
Old 07-18-2011, 08:15 PM
iteachyou iteachyou is offline
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Default HELP w/Thermostat housing parts

I was told my thermostat is leaking... what are some signs and symptoms I should look for to verify? The mechanic told me I didn't see the leak because it was inside the housing and by the time it should be leaking out it is evaporating.

What are the parts I need so we can do this ourselves and hopefully not have to pay over the quoted $600!!


2005 Ranger 4.0L V6 Automatic 2WD

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  #2  
Old 07-18-2011, 08:27 PM
sbristow84 sbristow84 is offline
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Default Re: HELP w/Thermostat housing parts

thermostats are around $20 in parts at most. and it only takes about 20-30 minutes to change.
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  #3  
Old 07-18-2011, 08:39 PM
wvcat wvcat is offline
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Default Re: HELP w/Thermostat housing parts

The thermostat housing is a 2 piece plastic part that is located under the front of the intake. They are sealed with orings. Eventually the plastic goes bad and the start to leak. Mines an 04 and is also leaking. To change it you need to pull off the upper intake. You can see it if you look under the front of the intake. On my truck sometimes I smell antifreeze when I get out of the truck after driving it for a while
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Last edited by wvcat; 07-18-2011 at 08:42 PM.
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Old 07-18-2011, 10:44 PM
Rg1Baja Rg1Baja is offline
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Default Re: HELP w/Thermostat housing parts

The housing is around $60 @ Ford and the thermostat is roughly $35. And those are OEM Ford parts. I cant see spending anywhere near $600 to change it for you. Book time at the dealer is 1.1 hours. Thats $500 an hour. Im in the wrong field of work at that rate. If you are slightly mechanically inclined you can do it yourself.
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  #5  
Old 07-19-2011, 03:46 AM
lvbluesboy lvbluesboy is offline
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Default Re: HELP w/Thermostat housing parts

You can change the thermostat itself without taking off the lower housing, but if your housing is leaking at the back into the intake valley that is another issue.

The slower, but safer way to do it is to do as suggested and take off the upper intake to gain access. It isn't hard to do, just time consuming and you may need to purchase/borrow/steal some tools to do it. The intake bolts are torx and the fit is very tight, but doable.

The big thing for me was the two sensors in the housing itself. If you are taking off the housing and replacing it, it will save you a lot of grief if you get new sensors at the same time. The "O" rings on the sensors are kind of one use only and generally leak if they are re-used. They are also an odd size so it is safer to replace the sensors.

The item generally leaking is the O ring at the base of the housing. Make sure you get a new one. Some of the housings don't come with them depending upon where you get it.

As a disclaimer, it is possible to change out the housing without taking off the intake, but it is much easier with it out of the way. There are some good instructions on ALLDATADIY if you belong to that site. You don't need to take apart near as much as it looks. Just be careful.
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Old 07-19-2011, 10:09 AM
iteachyou iteachyou is offline
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Default Re: HELP w/Thermostat housing parts

Thank you everyone for the help! Looks like I know what we're doing this weekend!!
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  #7  
Old 07-19-2011, 10:21 AM
doyouquaxu doyouquaxu is offline
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Default Re: HELP w/Thermostat housing parts

looks like theytaughtyou, iteachyou!
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  #8  
Old 07-19-2011, 12:00 PM
iteachyou iteachyou is offline
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Default Re: HELP w/Thermostat housing parts

Looks like they did... I'm a preschool teacher hence the name My BF will be doing the work this weekend
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  #9  
Old 07-20-2011, 05:29 AM
lvbluesboy lvbluesboy is offline
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Default Re: HELP w/Thermostat housing parts

BTW iteachyou,

If you go with the remove the intake manifold route be sure you get a new intake gasket/seal set. They are also a type of "O" ring, but oblong shaped and compress as the manifold is tightened. They are not re-usable.

Also, that method will give you a chance to clean out the intake valley area, which I guarrantee you is nasty and full of anti-freeze residue. You will not be touching the fuel delivery system to any extent, so you don't need to worry about that. Just make sure you get the instructions before doing so because like I said earlier, without them you will be taking apart a pile of stuff you don't need to.

Mine was leaking out the backside of the housing around the base and dripping down the front of the motor. I didn't know it at first and ran very low on coolant the first time I discovered it. Because of where it is, the coolant often vaporizes before it hits the ground, but usually you will see signs of a leak somewhere under the front of the car.

It is a pain, but you will be happy when it is completed. Do yourself a favor and replace any hoses etc. that need it while you are doing this.

Have fun!
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  #10  
Old 07-25-2011, 06:26 AM
Jimbo Jimbo is offline
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Default Re: HELP w/Thermostat housing parts

Check this site out on how to change your thermostat housing...

http://bengrosser.com/howto/fordthermostat/

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FYI.....Amazon.com has all the parts: Lower and upper thermostat housings, thermostat, both O'Rings/gaskets and sensors.....$124.00
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  #11  
Old 07-27-2011, 04:36 AM
Jimbo Jimbo is offline
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Default Re: HELP w/Thermostat housing parts

$124 for parts from Amazon.com and three hours of labor......Thermostat Housing replaced....without removing intake.....no more leaks.....

Housing was leaking in back lower portion leaking down the engine valley.
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