Ok so I understand the 6.0 cooling system self purges air.
I assume this is through the degass bottle and cap? I also understand thatmit can take a week or so to fully purge air from the heater core and all? Why is that? Shouldn't it purge pretty quick when up to temp for a decent amount of time?

 

This has often been a concern of mine as well, so far I have been lucky when I drain the Delo ELC to change my coolant bypass filter (I did not use the ball valves--too restrictive) by capturing the all the coolant filtering and refilling I have been able to replace 100% by slowly adding the coolant. I recently picked up one of these in order to speed up the process, the Airlift™ Kit. Here is their website. Airlift? Kit | Cooling | UView
Hope this helps.
Ed

 

i leave the cap off and get the truck up to temp. Run the heater on high and watch the coolant circulate for a short period and cap it off... done.

You think you have air bubble or something like that?

It should vent it pretty fast, like you said... a good drive AND heater on.

 

Yep was thinking I have air. Since I changed the water pump it wasn't until today that the heater blew hot all the way through the up to temp cycle. All week long it blew warm from start up to 160 then blew cold to 170 then warm to 180 then cool to 192 then would stay warm. I think I will try the cap off until up to temp thing--I like that.

 

you sure it's not a blend door issue? You said possible vacuum leak's in the 4x4 hub thread.

 

I've drained my system more then many have and it has only taken a day for the air to congregate in the degas bottle. Top it off that day and the level stabilizes. It not that there are large bubbles of air that are circulating through the system, it's small pockets that just need to shake loose and purculate to the appropriately named "degas" bottle, not reservoir.

The engineers did a pretty good job at providing pathways at the locations where air could be trapped, hence the two minor hoses feeding to the degas bottle.

 

Was thinking that possibly until yesterday evening when the 4x4 and all worked fine--of course then again the heat worked properly today as well--so maybe it was all related with the vacuum and has worked itself out. Well see.

 

Kinda how I was thinking it should be.

 

Bottle or reservoir I can follow, (although some brands of condoms have a "reservoir tip" - humorously grandiose term usage in my opinion) it's all the posts with "degauss" (or degaus) that had me mildly amused. For a while I wondered if it had some strange magnetic property I didn't understand

 

I believe it's only referred as a Degauss bottle if it sits directly over the mysterious Front-Rear.