bubbly recovery tank.. uh oh?
 

i'm a new member here but i've been driving my 04 dale jr edition monte ss for about 8k miles and 6 or so months with no problems.. never owned one before but aside from some minor electrical problems this thing runs like a damn CHAMP!

but today i got my dexcool flushed at jiffy lube and when i got home to inspect their work (because it was jiffy lube...) i opened the recovery tank cap to notice little bubbles.. i don't want to cry wolf too soon because it may just be purging some air through the system but it seems a little too consistent for that and i'm worried it may be a leaking HG. the car has 44k miles but is out of warranty and i just swapped head gaskets on a northstar and dunno if i'm up for another round of those

is this something to worry about? like.. should i sell it and let the next guy deal with it? it's got brand new dexcool.. that's gotta be worth something ;)
but the car doesn't show any other signs of hg failure.. i don't lose coolant, over heat, spew white clouds out the exaust, or anything else of that nature. am i fretting for nothing? how long do i have to run this coolant before i go get it tested for combustion byproducts? your input would be appreciated.. thank you in advance

I'm guessing they didn't purge the ait from the thermostat housing. There is a purge valve, plug, or something on there to get the air out. It MUST be done when the fluid level goes down, such as a flush.