:: Cracked Thermostat Housing Assembly :: - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 07-09-2006, 08:23 PM   #1
..:: sleestak ::..
on thin air
 
..:: sleestak ::..'s Avatar
 
Join Date: Apr 2005
Fan#: 22528
Location: The Lou, MO
What I Drive: 04 Forester XTi

Posts: 3,612
Points 14,456, Level 78
Points: 14,456, Level: 78 Points: 14,456, Level: 78 Points: 14,456, Level: 78
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 80 ..:: sleestak ::.. Excellent Standing Member
Buy-Sell-Trade Rating: (15)
:: Cracked Thermostat Housing Assembly ::

I have seen a few threads about this but no pics...In short, our notoriously leaky valve cover gaskets seep oil and it gets between the block and Thermostat Housing this causes the Oring to swell and sometimes crack the plastic.

Just thought I would show you a pic of what that is exactly...I just dealt with this today...good thing I bought the housing assembly as well.



As you can see the one on the left is the bad one. The ring swelled and did crack the pastic that surrounded it.

The repair went really easy. Just drain the coolant, unhook the hoses and take three bolts outta the side of the housing to remove it from the side of the block.

On the front of it is another plastic piece held in place with three screws (and some mysterious chunk of metal on two of them). Just unscrew them and pop it off...you will find your thermostat inside:


You will need to swap that over to your other housing, but check to make sure the rubber seal around it is in good shape. You might just want to go ahead and replace it while you are at it...its pretty cheap but you will have to buy the thermostat and rubber gasket around the edge seperately. ALSO, be sure to pay attention to the little air vent hole in the top of the thermostat and its position as its seated within the housing. You basically want it at the top, so it can let air breathe out.

Two other things you are going to want to swap/check are the sensor in the top:


and the ridiculous plug on the bottom:


As you can see they have little metal clips which hold them in place. Just grab it with a pair of needle nose and pull it off, then you can pull the part from the housing.


**Note** I pulled my silver "plug" and put it into the new housing...the Oring on it was crapped out and when I started my car, it began to leak. So you may want to look into getting one as backup as well as a new sensor. They both have Orings on them that could easily get toasted by the heat and chemicals. In the dealers exploded diagram, it showed a second sensor going to where the plug was, I am guessing that they use this housing on other cars and just plugged that hole up. Just keep it in mind and use the part number I listed below if you need to replace it.


All in all, super easy to do. Should take you about an hour and a half....basic blot off/bolt on operation.

Hope this helps some of you if you are thinking about doing the repair yourself. Its simple and cheaper than letting the dealer do it.


**UPDATE** Here are some part numbers for you (SVT)

Thermostat Housing Assembly - XS7Z-8592-AD (roughly 68 bucks and it includes a rubber gasket)
Sender Asy (sensor on top of assembly) - XS6Z-12A648-CA ($19)
Silver Plug - 2M5Z-12A648-AA ($15)
Thermostat- F8RZ-8575CA ($10)


__________________
..:: sleestak ::..

"Our mother of blessed accelleration, dont fail us now!" -- Elwood Blues

Last edited by ..:: sleestak ::..; 07-10-2006 at 04:55 PM.
..:: sleestak ::.. is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 12:42 AM   #2
PizZel
Focus Enthusiast
 
PizZel's Avatar
 
Join Date: Sep 2003
Fan#: 488
Location: Hanover, PA
What I Drive: Turbo'd 03 CD Silver SVT

Posts: 523
FF Reputation: 1 PizZel Good Standing Member
Buy-Sell-Trade Rating: (0)
good wright up, maybe someone should make this a "sticky".
__________________
205whp 179tq @ 7psi

"Always do sober what you said you‘d do drunk. That will teach you to keep your mouth shut."
PizZel is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 12:58 AM   #3
MISVTfocus
Focus Fanatic
 
MISVTfocus's Avatar
 
Join Date: Oct 2004
Fan#: 13841
Location: Detroit, United States
What I Drive: 08 Fusion SEL, Focus ST on order

Posts: 3,105
FF Reputation: 1 MISVTfocus Good Standing Member
Buy-Sell-Trade Rating: (3)
PM WD on this one he'll add it to his "SVT specific repair thread" I assume.

Good write up, mine hasn't kicked yet but if it does thanks!
__________________
Oh yeah!
MISVTfocus is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 12:58 AM   #4
likwhoa
Focus Enthusiast
 
Join Date: Mar 2006
Fan#: 33621
Location: milwaukee, WI
What I Drive: 2002 silver svt

Posts: 195
FF Reputation: 2 likwhoa Good Standing Member
Buy-Sell-Trade Rating: (5)
did u also put a new Thermostat in andhow many o rings r there. I think mine is broken too
likwhoa is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 01:31 AM   #5
..:: sleestak ::..
on thin air
 
..:: sleestak ::..'s Avatar
 
Join Date: Apr 2005
Fan#: 22528
Location: The Lou, MO
What I Drive: 04 Forester XTi

Posts: 3,612
Points 14,456, Level 78
Points: 14,456, Level: 78 Points: 14,456, Level: 78 Points: 14,456, Level: 78
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 80 ..:: sleestak ::.. Excellent Standing Member
Buy-Sell-Trade Rating: (15)
there is an Oring on the housing itself, that seals off between the housing and the block.

there is a rubber seal on that silver plug looking piece and also on the sensor....and one other that goes around the outside edge of the thermostat.

Thermostat is like 10 or 12 bucks, I believe.....I have to replace that seal on the silver plug piece tomorrow. I will update the post with more info as I get it on prices and part names/numbers.
__________________
..:: sleestak ::..

"Our mother of blessed accelleration, dont fail us now!" -- Elwood Blues
..:: sleestak ::.. is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 02:20 AM   #6
likwhoa
Focus Enthusiast
 
Join Date: Mar 2006
Fan#: 33621
Location: milwaukee, WI
What I Drive: 2002 silver svt

Posts: 195
FF Reputation: 2 likwhoa Good Standing Member
Buy-Sell-Trade Rating: (5)
thanks for the info
likwhoa is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 04:53 PM   #7
..:: sleestak ::..
on thin air
 
..:: sleestak ::..'s Avatar
 
Join Date: Apr 2005
Fan#: 22528
Location: The Lou, MO
What I Drive: 04 Forester XTi

Posts: 3,612
Points 14,456, Level 78
Points: 14,456, Level: 78 Points: 14,456, Level: 78 Points: 14,456, Level: 78
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 80 ..:: sleestak ::.. Excellent Standing Member
Buy-Sell-Trade Rating: (15)
** Updated ** added list of part numbers for some of the parts
__________________
..:: sleestak ::..

"Our mother of blessed accelleration, dont fail us now!" -- Elwood Blues
..:: sleestak ::.. is offline  
    Reply With Quote Quick reply to this message
Old 07-10-2006, 11:22 PM   #8
WD40
The Librarian
 
WD40's Avatar
 
Join Date: Mar 2004
Fan#: 5157
Location: Helena, MT
What I Drive: '04 Sonic Blue - SVT 3Door

Posts: 13,116
FF Reputation: 138 WD40 Excellent Standing Member WD40 Excellent Standing Member
Buy-Sell-Trade Rating: (3)
Thanks for the info!

One thing I'd like to confirm is if these are the same part numbers for the standard ZETEC.
I think so...
It's my understanding that there's no difference between the housing, thermostat, or related parts.
^^^But, if that can be confirmed, I'm sure we'd all rest easier.

Moved to ”Ford Focus Technical Chat”
WD40 is offline  
    Reply With Quote Quick reply to this message
Old 08-11-2006, 09:35 AM   #9
Egz
Sückn' n Blown
 
Egz's Avatar
 
Join Date: Sep 2003
Fan#: 442
Location: Tappahannock, VA
What I Drive: 2003 2.3l ZX3

Posts: 7,742
FF Reputation: 111 Egz Excellent Standing Member Egz Excellent Standing Member
Buy-Sell-Trade Rating: (3)
Quote:
Originally posted by WD40
Thanks for the info!

One thing I'd like to confirm is if these are the same part numbers for the standard ZETEC.
I think so...
It's my understanding that there's no difference between the housing, thermostat, or related parts.
^^^But, if that can be confirmed, I'm sure we'd all rest easier.

Moved to ”Ford Focus Technical Chat”
I don't think they are the same. I'm getting ready to repair my girlfriend's 00 Zetec, and while researching this, it appears the standard Zetec housing is different from the SVT housing. The biggest thing to note is the Zetec doesn't have that silver plug.
Egz is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:04 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Audi S3, Ford Fusion and Acura TLX. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. Challenger Hellcat - Charger Hellcat