Coolant loss

O/O here looking for advice on a big coolant loss of at least 1/2 gal - 1 gal per day.
Truck: 2013 peterbilt 386
Engine: ISX 15 400ST
DATE: 12/12
ENG # 79630574
FAMILY: CCEXH0912XAP
REF # : E6D2DP737C728J7471
Egr, dpf, def deleted. Inframed approx 250k miles currently 880k miles on odo
When I first started having coolant loss with no visible leak I ended up hydro locking in a dock. Was able to pull start and get it to my mechanic.
He determined that I had a cracked head and the cam shaft was flaking. New head, cam etc $11k and 2.5 wks down. I pick up truck and and start working and have to bring it back within one week. In that 1 week time I put 8gal of coolant in it. Mechanic took it all apart and supposedly took head to 2 different shops and those 2 places said no crack but an injecto cup was leaking. Mechanic ate that cost but I lost 3 wks no work.
Still having coolant loss at same rate. I do smell it while driving and every once in a while will see the white smoke/steam. I have an idea but I am no more than a shade tree at best. Without giving my idea I'm looking for yours. Any and all thoughts and responses are appreciated.

 

Yes! Egr Cooler is still in place. That is what i was thinking is my issue. Do you know if I bypassed/ and plated it off if I would have further issues with anything else in relation to the egr cooler being "deleted"? Like I said, I'm a shade tree mechanic at best. You reckon I could tackle that myself?

 

Ok, thanks

 

Was your resivoir spitting coolant out? Mine does. Surely its not spitting a gallon a day but it does spit it out through the pressure cap. I changed both caps the other day and still spits. My resivoir is approx a yr old.

 

I'm sure I could probably do it. However, my concern is I don't have a shop or cant get bobtail to the house. So all my work would be done at where I park but if I get stuck with an issue I can't just drop it and come back..