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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

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Old Jan 15, 2012 | 05:08 PM
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Riddle me this

Puked some coolant out my degas bottle the other day. Probably a pint or so...enough to drop the line from the full to just below it.

White splatter on the degas bottle so I know where it came from.

All temps and everything are normal, degas bottle is clean inside, no growing oil either.

Should note that it has been holding steady at the full line since last summer when I had the upper radiator hose replaced.

Oh...and was not towing or anything and temps were in the 40's I think.
 
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Old Jan 15, 2012 | 05:44 PM
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1 possibility is leaking head gaskets.
 
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Old Jan 15, 2012 | 06:04 PM
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Nothing foreign in the degas bottle.

Remember I also had the 11B23 flash.
 
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Old Jan 15, 2012 | 06:21 PM
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Another possibility is the degas cap is on it's way out and not holding pressure.
 
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Old Jan 15, 2012 | 06:27 PM
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Originally Posted by ljutic ss
Another possibility is the degas cap is on it's way out and not holding pressure.
Yup, that is gonna be the one.

Got to get a new cap tomorrow morning.

Will sand the mating surface slightly and then all should be good in coolant land
 
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Old Jan 15, 2012 | 07:33 PM
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Not to just topic but what does the degas bottle do?? Didn't know I had one to begin with.
 
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Old Jan 15, 2012 | 07:46 PM
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degas bottle is like the over flow coolant bottle on a gas motor, except on diesels it is part of the cooling system.

Still the add point if need to add some.
 
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Old Jan 15, 2012 | 10:28 PM
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So I'm guessing you knew the answer and just wanted to see who else may know?
 
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Old Jan 16, 2012 | 05:11 AM
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Well I have to go by the cap today.so it is just thery for now.
 
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Old Jan 16, 2012 | 06:55 AM
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Originally Posted by senix
degas bottle is like the over flow coolant bottle on a gas motor, except on diesels it is part of the cooling system.
Not to nitpick, but the fact that it's a diesel has absolutely nothing to do with whether or not it's plumbed as part of the cooling system. My 2000 Ford Contour as well as my 2011 Mustang have degas bottles. As did my '05 Mustang and '07 F150. Ford has been using them for quite awhile in all of their vehicles, and many other manufacturers are also using them instead of reservoirs.

And as far as I can tell it's called a degas bottle because gas is constantly bled from the system at this point. Not sure how gas would get in there or anything, but this is where it would come out.
 
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Old Jan 16, 2012 | 07:58 AM
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The degas bottle also acts as a expansion and contraction tank, and if my memory is correct the 1966 Ford GT Fairlane had a expansion tank.
 
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Old Jan 17, 2012 | 07:27 PM
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At less than 20$ bucks the cap is worth trying, that was one of the things I forgot to mention in my other thread. Didn't work for me! I have heard that the egr cooler can flash boil on certain occasions and all conditions being met. They ended up removing the horizontal cooler and tested it under water with air pressure took about 15 min. to leak. (pinhole) So with that replaced all was supposed to be good, as always with me it didn't solve my issue. Hopefully yours will be a onetime deal and not repetitive like mine.

Thanks for your insight on the other thread Sincerely, The wet one! (c1ford)
 
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Old Jan 18, 2012 | 04:14 PM
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Well replaced cap today, lightly sanded the opening to ensure it is smooth and a good clean surface and replaced with a revised cap.

Nice clean degas bottle.

Will be on the road tomorrow basically unloaded (hauling trash, Yah!). That will be the test to see if it pukes again.
 
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Old Jan 18, 2012 | 04:17 PM
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Keep it under a 100mph, don't want the trash to blow out.
 
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Old Jan 18, 2012 | 05:36 PM
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Speaking from experience?
 
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