Getting this leak now.

[Wes Davis]

I think I have seen this on the forum as a pretty common leak. What is this? Is it just a gasket or do I purchase the housing. Is there a project write up?



Thanks





[Broken External Image]:

 

[Scott Tanner]

yep. i got it after i replace the t-stat, had to get a new upper housing. might as well replace both while you're at it. remove alternator bolts only, as well as TB and intake hose.

 

[Wes Davis]

Ok looks like thermostat housing. Do these parts look correct?





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[Wes Davis]

 

[Wes Davis]

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[swshawaii]

One of the most used MyST projects. Use the single sensor RH-148 housing.

One less sensor to buy and have leak. Not a difficult job, just confined. GL

 

[Wes Davis]

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[Wes Davis]

So it is recommended or necessary to replace everything? The upper and lower housing, thermostat and gaskets?



Thanks





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[swshawaii]

The only parts required for the basic repair are a Motorcraft RH148 lower housing, DY1004 ECT sensor,

RG614 lower seal, and a 35617 Fel-Pro upper seal. Highly recommend that you replace the RT1167

thermostat, and inspect the Motorcraft KM3269 bypass hose while it's apart. Glad to help if I can.

 

[swshawaii]

Also inspect your RH147 upper housing. Appears to be damaged in your pic.

Note the RH165 part number in the project may not be correct. Double check.

 

[Wes Davis]

Notice in my pic I have two sensors but only one of them is being used. This is Ford factory original. I wonder what the other sensor application is for?





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[swshawaii]

More than likely left over parts from non flex fuel ST's from 2003 and earlier.

Why I said to use the RH148 SINGLE sensor housing and only the DY1004 sensor.

 

[Mark Price 2]

just a side note.. I found when changing my thermostat(RT1167) that Mororcraft part # RG637 Thermostat O-Ring fits a little more snug than the 35617 Fel-Pro.(i ordered both) Not a big deal either way. It is the W702837-S300 part listed in the project. I ordered mine from rockauto.com. It came as RG637/W702041-S300. It is the same part. Maybe just a updated part # since the project was posted. Good Luck.