MAJOR COOLANT LEAK!!!!! - Ford Powerstroke Diesel Forum
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Old 09-02-2013, 01:06 PM
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MAJOR COOLANT LEAK!!!!!

OKguys so my newest adventures with this piece of #?*! is ever since i flushed my radiator and put a new a new t-stat in its been leaking like a mofo i set o ring in right but i did not lube it and ive taken it back off and tried resetting it (still didnt lube the oring) and it still leaks bad so my question is anybody got any tips for me?

also on a side note i completed the fuel system wiring kit(easy as hell) but now my truck it running rough (like a big loppe tune without the lope lol its almost like a miss almost like one of my injectors might have taken a dump during cranking but im not sure so does anybody have anythoughts on this
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Old 09-02-2013, 08:29 PM
m j m j is offline
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no need to lube the oring, but it is very tricky to set the housing on it without disturbing the oring
I placed the oring, then held the housing over it and slowly evenly pulled the housing down with the bolts
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Old 09-02-2013, 08:36 PM
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Ok didn't think so I wouldn't think it would have been necessary to lube it and I pretty sure I've got it this time I ended up taking it all apart again and took so sand paper to the housing to get it nice and flat and then I reset the tstat in the seat and resat the boring in and I'm pretty sure it's good now I'll find out tomaro for sure once I get it flowing through the whole thing lol

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Old 09-02-2013, 08:37 PM
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I would get the Diesel Site billet thermostat housing. Better than the stamped metal housing from Ford.
I also did bad sealing on my first water pump job. Needed a wire brush and went to town on making a smooth surface.

How long have you run the truck with your new fuel system? Maybe still air or it's sucking air?
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Old 09-02-2013, 08:47 PM
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What hose do you use with the Dieselsite T-stat housing since it is shorter than the OBS housing? For the OBS housing, you need to make sure that the housing ears are very slightly bent upwards so it presses down when the bolts are tightened. There also used to be a nice little piece available on ebay that went under the bolts to provide even pressure on the housing. Found it: Ford 7 3L Powerstroke Navistar T444E Thermostat Housing Leak Fix Kit Stainless | eBay
(it's available in plain steel as well for a bit less). Cheers!
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Old 09-03-2013, 04:40 AM
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Nevermind, maybe they don't have an OBS housing.
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Old 09-03-2013, 05:40 AM
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I let it sit for a couple hours and it was fine so I still think it needs a set of baby swamps lol. And as for the coolant leak I think I fixed it hopefully:thumbup:

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Old 09-03-2013, 11:28 AM
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Quote:
Originally Posted by jesilvas View Post
Nevermind, maybe they don't have an OBS housing.
Darn, I thought you might have had something that would work instead of the OBS neck. Cheers!
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