Welp, after much speculation I've concluded my HG's are gone. Losing coolant daily. Have the updated cap, new degas bottle, and still losing fluid. EGR's deleted, no white smoke, just losing coolant and seemingly have lost power. I'm at a loss because I don't beat on it everyday and I'm meticulous with maintenance. I wish y'all could hear the hissing/whining coming from the degas bottle. It's by far the loudest I've ever heard.
I'm thinking 3 things right now...
1) Do it all DIY in cab and upgrading some goodies like turbo, injectors, fuel system etc since I'd be saving some coin.
2) Paying a local area guy to do studs and HG's to have a quick turnaround. I think he said $2,200 for labor and he would lap the valves as well.
3) Dropping a Cummins in it and parting out what I have. While also switching to a 6-speed. 12v or 24v?
Any thoughts suggestions? C'mon late night crew!