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Old 12-01-2011, 01:48 PM   #1
2007FocusGuy
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Thermostat question...

Hi all,


I have a quick question. This is more geared towards my mother's 2002 Escape, but since it also has the 2.0 Zetec engine like the earlier Foci, I was hoping ya'll might could help.

Here's the issue. Appariently, in Ford's INFINITE wisdom, they used a plastic t-stat housing which is prone to warping/cracking and leaking. Well, my mother has had a continued coolant loss issue for a little while now, and upon further inspection, I found wet spots on the drivers side of the head near the black housing, as well as liquid on the skid plate underneath as well as the bell housing. Most I have asked confirmed this is 99% likely the issue.

Here's the bad part. Money is really tight, and we simply cannot afford a $45 replacement housing. I can easily get the new o-ring ($3). Is there ANYWAY at all to temporarily salvage the stock unit if it is cracked? JB Weld, silicone, anything? I know nearly everyone here does not like "band-aid" fixes, but this is all we can do right now. So if anyone has any helpful information, I would most grateful. Thanks!


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Old 12-01-2011, 02:01 PM   #2
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In most cases it is the o-ring leaking , when you remove it to check the housing clean it good , check for cracks and change the o-ring if all looks good

Clean the head good as well

If it is cracked then look at salvage yards and save a few bucks or check ebay , it isnt worth patching when a over heated engine could cost you 1000.00 - 2000.00 $$$

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Old 12-02-2011, 03:01 PM   #3
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Head over to rockauto.com, they might have a cheaper replacement. Do replace the housing O ring and the block to housing O rint (they're separate).

If you want to pay for shipping, I can send you one thats in shape. Just pay shipping, my postal code is j0t 2n0. Calculate shipping and let me know if you're interested.

Email at g_noury@hotmail.com
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Old 12-05-2011, 01:21 AM   #4
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Originally Posted by deadend9009 View Post
Head over to rockauto.com, they might have a cheaper replacement. Do replace the housing O ring and the block to housing O rint (they're separate).

If you want to pay for shipping, I can send you one thats in shape. Just pay shipping, my postal code is j0t 2n0. Calculate shipping and let me know if you're interested.

Email at g_noury@hotmail.com

I appreciate the offer. After discussing the issue with my mother, she decided to go ahead and replace the housing and everything. My guess is she had an 'ultra emergency' nest egg somewhere. Got the housing (all gaskets and t-stat included) for $50.39. Are there any specific how tos for this swap? I have seen videos, but they don't cover everything well. Also, will I need any RTV?
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Old 12-05-2011, 01:48 PM   #5
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No need for RTV but you want to make sure when you tighten the screws and the bolts that you dont overtighen them and you want to make sure they're all equally bolted down to avoid leaks.

Its pretty foolproof if you use care. Do replace the spring clips with worm gear clips, you will be replacing the thermostat/housing again some time down the road.
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Old 12-05-2011, 02:38 PM   #6
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Quote:
Originally Posted by deadend9009 View Post
No need for RTV but you want to make sure when you tighten the screws and the bolts that you dont overtighen them and you want to make sure they're all equally bolted down to avoid leaks.

Its pretty foolproof if you use care. Do replace the spring clips with worm gear clips, you will be replacing the thermostat/housing again some time down the road.
Explain this one to me more, please. I am a newb with these types of t-stats. I'm used to my Jeep Cherokee; 2 bolts and some RTV, you're good to go.

Edit: I had a der moment. Do you mean the hose clamps?
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Old 12-05-2011, 04:34 PM   #7
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Sorry i was not more clear. yes the hose clamps, the OEM stuff is a pain in the butt to remove because you have little clearance to get regular pliers in there. You don't NEED to replace them but if you are keeping the car for a long time, do replace them when removing them for future ease of removal.

Google both clips and you'll totally understand what im talking about!
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Old 12-06-2011, 01:33 AM   #8
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Sorry i was not more clear. yes the hose clamps, the OEM stuff is a pain in the butt to remove because you have little clearance to get regular pliers in there. You don't NEED to replace them but if you are keeping the car for a long time, do replace them when removing them for future ease of removal.

Google both clips and you'll totally understand what im talking about!
Absolutely. I always keep a couple of those clamps handy, because the spring ones suck, even with room to work around them. Thanks for bringing that to my attention.

2 questions: I was looking at the housing, and I was a little confused.

1) It looks as though the housing has 2 bolts and then a stud that a nut screws to. Is that normal?

2) From the videos I've watched, the t-stat must be orientated with the vent hole upwards to release air through a hose that attatches to a fitting on the t-stat cover. On my mother's Escape, the same fitting is there, but it is capped off with a spring clamp and a little block off cap. What's the deal with that? Idk if it matters, but her Escape is a 5-speed.

I appreciate all the help.
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Old 12-06-2011, 12:52 PM   #9
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1) On the focus, its three bolts that bolt the housing to the block. Maybe the escape's is different, make sure you put everything back together as it was originally.

2) You can only put the thermostat in one way for the two halves to close properly. Check carefully how its put together when disassembling things.
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Old 12-06-2011, 12:58 PM   #10
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Quote:
Originally Posted by deadend9009 View Post
1) On the focus, its three bolts that bolt the housing to the block. Maybe the escape's is different, make sure you put everything back together as it was originally.

2) You can only put the thermostat in one way for the two halves to close properly. Check carefully how its put together when disassembling things.

Sounds good. I've done thermostats, alternators, headers, Lord knows what else on various other vehicles before, including my own. I guess the reason I'm so cautious and stupid about this specific job is becuase it's my mother's vehicle and I want to take any and all precautions. I appreicate all your help. I think the part comes in this evening. Will tackle it tomorrow morning. I'll post my results. You either see a "Hell Yeah! Job done! Woot!" or "Oh sh**. I did something..." lol

Again, thanks for all the help!

Edit: One last question. All the vehicles I've done t-stat swaps and water pumps, coolant flushes, etc, they were open system. With the 2.0 zetec being closed system, is there any special thing I need to do to make sure all air pockets get out?
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