Coolant issue...need help!
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Junior User
Joined: Jul 2016
Posts: 59
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From: VA
Coolant issue...need help!
I've been MIA for a while. 2006 F250 just hit 83k miles. My coolant must be puking out of the degas tank. White residue all over degas and drivers side engine bay. I had my mechanic buddy pressure test coolant system for several hours and he said there weren't any leaks. He told me to replace the degas cap for now. Didn't solve the problem. Temps have always been fine. Never found drops or a puddle of coolant. Even when the truck has sat overnight for over 8 hours, there is still a bunch of pressure built up when cap is removed. Any help would be greatly appreciated!
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
Is the degas bottle neck perfectly flat? There have been cases of a warped neck not allowing the cap to seat correctly, and even hairline cracks that are a bugger to see.
Running tunes?
Studded if so?
Running tunes?
Studded if so?
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
For starters the tech folder has a good write up by Mark.
https://www.ford-trucks.com/forums/1...nts-degas.html
https://www.ford-trucks.com/forums/1...nts-degas.html
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Laughing Gas
Joined: Feb 2016
Posts: 817
Likes: 27
Seems like if the system has been pressured tested and holds pressure overnight that it's not a leak or the cap. With no EGR cooler it sounds like gaskets.
What level is your degas at?
What level is your degas at?
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Fleet Mechanic
Joined: Aug 2013
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From: Louisiana
X2, not sure why you would tune the truck without studs.....
Logistics Pro
Joined: Nov 2010
Posts: 3,673
Likes: 6
Install a pressure gauge and route it into the cab and take it for a ride......
Who cares if the truck isn't studded and tuned?
I beat my truck hard on a tune but never had coolant puke-although I had 14psi in my cooling system.
100s and 100s of trucks are out there not studded and tuned.
Who cares if the truck isn't studded and tuned?
I beat my truck hard on a tune but never had coolant puke-although I had 14psi in my cooling system.
100s and 100s of trucks are out there not studded and tuned.
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
Take some emery cloth if you find any abnormalities.
The tech folder is full of some good tips, no use thinking it's worst case until we look at the simple stuff.
Is the new cap a good brand or a who-flung-dung POS?
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Junior User
Joined: Jul 2016
Posts: 59
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From: VA
I bought a new oem motorcraft pressure cap. I quite possibly be filling the bottle too full. I've only ever added coolant in the morning after the truck sits overnight to cool down and always to the updated sticker fill level line. I don't have any white smoke out of my exhaust. My coolant temp and oil temp are always within 10 degrees after warming up. I'm really hoping I don't have to pull the trigger on studs and headgaskets yet
Logistics Pro
Joined: Nov 2010
Posts: 3,673
Likes: 6
Only thing I can say is if it's the head gaskets I wouldn't sweat it to much.....it's not a massive deal if you can handle turning basic wrenches.
Worst part about it is torquing the bolts. Every truck I've done I did cab on
Worst part about it is torquing the bolts. Every truck I've done I did cab on
Thread Starter
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Junior User
Joined: Jul 2016
Posts: 59
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From: VA
Well that's some positive news. However, if it is the headgaskets I will most likely have a buddy do the studs also while everything is torn apart. I wonder if I could hook my go pro camera up under the hood with a light to see where the coolant is coming from?...just an idea