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Old 03-23-2007, 06:06 PM   #1
shadyluke
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Coolant leak

We have a 2000 focus SE with the Zetec motor and a coolant leak. leaks pretty bad will drop the resevoir from max to min in about a week. I was searching around and found this .....link Could that plug leak that bad and does my SE even have that. Vehicle is not close by to check myself at the moment.

Would blowing a radiator hose at one point help something leak by over pressurizing it? We had a hose go not too long ago and it was replace and used new clamps.

Vehicle has 113k on it. I find my pushrod ranger so much easier to work on.
Thanks for any help
Luke (another noob)


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Old 03-23-2007, 07:44 PM   #2
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The most common leak from a zetec is the thermonstat housing. its on the side of the head on the tranny side
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Old 03-23-2007, 08:09 PM   #3
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Quote:
Originally Posted by downloader View Post
The most common leak from a zetec is the thermonstat housing. its on the side of the head on the tranny side
Thats exactly what I was reading about. The tranny is completely covered in coolant.
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Old 03-23-2007, 09:04 PM   #4
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Check the following thread. It pretty well covers the thermostat-housing leak story:

http://www.focusfanatics.com/forum/showthread.php?t=113497

For an example of this failure and "how to" fix it see:

http://www.focushacks.com/index.php?modid=59

Remember to replace the leaking valve-cover gasket.

Let the forum know what you find. Good luck
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Old 03-29-2007, 12:06 AM   #5
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It appears to be the typical Thermostat housing leak at the seal between the housing and the block. I may be a complete idiot about this car but isn't the zetec a DOHC? I stopped by Advance and they don't list that motor for a 2000 Focus SE. I don't suppose someone could help me out with a part number so I can get the seal so I have it to put in when I go home for Easter. Thanks
Luke
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Old 03-29-2007, 08:29 AM   #6
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if its that plug on the bottem of the housing try this thread

http://www.focusfanatics.com/forum/showthread.php?t=106246
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Old 03-30-2007, 08:54 AM   #7
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I think the easiest way is gonna be to replace the whole housing. The car has like 120K on it should I be replacing the thermostat while I am at it? Kinda wanna save some bank tho.
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Old 04-11-2007, 01:27 PM   #8
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Well I am gonna resurect this one more time. I changed the housing out last weekend while I was home. The o-ring between the block and housing was completely gone. I will most likely get some pics of the old part up later today to show how bad it was. Now that I cleaned up some of the block around the thermostat housing you can really see that the valve cover gasket is leaking on that front corner. Least I feel the car is more reliable for the girlfriend to drive everyday especially with the baby due anyday now.
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Old 04-12-2007, 08:15 AM   #9
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Good stuff. I have had a minor leak there for a year now, haven;t bothered to fix it because so little coolant leaks. Question - you replaced the housing, but was it necessary? Or was it just the o-ring that was toast?
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Old 04-12-2007, 11:20 PM   #10
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My housing was toast. I meant to get pics up of it but itz still burried in the bed of my truck. The plastic lip that is supposed to hold the o-ring is completely gone. There was no sign of an o-ring at all. Apprently she has been driving it like this for a while now and just keeps adding coolant to it once or twice a week. I actually upgraded her housing. The one she had did not have the Aluminum plug in the bottom but it was made of what appears to be ABS plastic. When I was buying the new one I had a coice between the same one or a much thicker and more ridgid feeling one. My materials knowledge makes me guess at it being made from Nylon. It uses machine screws to gold the thermostat in rather than threading into the plastic directly. I will get those pics soon I promise.
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