Ordered A gauge on e-bay, got hose & a T fitting. Will re check every thing when I get it. While it was sitting & ideling in my drive way yesterday it would built up pressure after 1.5 hours. After setting {off} for 3 hours there was still pressure on degas bottle. It could have been vacuum but I doubt It. No loss of coolant and did not lift pressure release on degas cap.. Today I drove it for about 50 miles high-way and loss about 3/4 gallon coolant. Started with coolant 1/4" above bottom. I never see white smoke or loose any power. If I have a blown head gasket would I not loose some power?? I am at a loss & need help. When I got home there was coolant around the degas cap, I could tell the pressure relief had lifted. My temp gage never changed once it got to temp. I never see any coolant under truck. This truck was "Bullet Proofed" 2 years ago. This has me totally confused. Help!!!

 

Do the pressure test (15 psig as suggested) and post the results. We can go from there. You have to troubleshoot before installing parts.

 

prolly the hose coming out the bottom of the edges bottle. It has a plastic Y built in that often cracks. I've had the bottle crack too.

 

The coolant in this video is the wrong color. Could that maybe part of the reason for his leak?

 

Couple of things - you refer to the marks on the degas bottle. If you don't know, those marks are wrong - the min level is now the max. If you're filling up to the max line, the truck could be forcing the excess out, although, IIRC, that usually comes out the cap.

No, bad gaskets doesn't mean loss of power - at first. You can actually drive with bad gaskets for awhile without noticing any change.

Your truck doesn't generate much heat while idling. Something to do with diesels, IDK why. It'll would take hours, if ever, to get a truck to overheat at idle. It's hard to even get it to WOT by idling. That's why you either have to remove the thermostat while flushing the coolant or go drive the truck.

SYK, the degas Y can leak and you might not ever see signs of coolant lost since it might only do it while driving, and the coolant could fall to the road.

 

Hi, I just bought a 05 excursion and it has this sticker on the coolant reservoir. Is this an 05 thing because my friend has a 02 and it doesbt have it on his. Thanks

 

I would assume his 2002 has a 7.3 totally different set up.but my 2005 x has the same sticker

 

ITs a 02 or 03 I can't remember but he says he doesn't have that sticker. The reason why I asked is because I didn't notice the sticker and was always used to going by what it says on the reservoir. I've been losing coolant out the cap. Replaced it with an OEM but then just yesterday noticed the sticker so I'm hoping that my overfilling was the result of it pissing out the cap. I have now lowered the coolant down to the stickers level.

 

Get the gauge hooked up and run the piping inside the cab. Monitor pressure from cold to full operational temperature .... at least 30 minutes. You should see the pressure increase to 12 and stabilize (+/-1). Mine goes to 12 and then +/-1 depending on what my right foot does and the grade I'm on. If it never goes above that, you should be good. To be sure, go outside and remove and reinstall the degas cap to release the pressure. Take another spin for about 10 minutes. The pressure SHOULD NOT INCREASE after you have relieved the pressure (+/-1 to 2 degrees). If it increases any more than that, there is a problem. If not, you're fine. The problem could be:

1) Ruptured EGR cooler (wet intake and EGR valve)
2) Head gaskets

As stated above, fill NOT fill past the "min" line. If you do, it will puke some coolant.

 

As an fyi - it is possible to get gasses into the coolant system from a leaking EGR cooler without getting coolant into the intake. Small leaks/cracks can behave this way.

 

Good to know. That would be a very small egr cooler failure, and I would speculate it would be a rare occasion.

 

[​​​​QUOTE=IHateCommieCars;19972347]Couple of things - you refer to the marks on the degas bottle. If you don't know, those marks are wrong - the min level is now the max. If you're filling up to the max line, the truck could be forcing the excess out, although, IIRC, that usually comes out the cap.

No, bad gaskets doesn't mean loss of power - at first. You can actually drive with bad gaskets for awhile without noticing any change.

Your truck doesn't generate much heat while idling. Something to do with diesels, IDK why. It'll would take hours, if ever, to get a truck to overheat at idle. It's hard to even get it to WOT by idling. That's why you either have to remove the thermostat while flushing the coolant or go drive the truck.

SYK, the degas Y can leak and you might not ever see signs of coolant lost since it might only do it while driving, and the coolant could fall to the road.[/QUOTE]


Is this tsb? Just asking as my sticker obviously from the pic wasnt installed properly in that case.
Thanks

 

I do believe it was a TSB, although I don't have it saved. Honestly, you might have to be careful - with the age of our trucks, many degas bottles have been replaced, maybe more than once. There are aftermarket clones readily available. they may have different stickers or placement. For example, I don't recall a bottle I replaced having the Min/Max lines stamped in the plastic, but maybe they do, Idk. But, I do believe that original bottles were the subject of a TSB changing the Min line on the bottle to be Max level to fill.