I think I found the problem. Was the damn water pump. Dirt dobbbers clogged both weep holes so the only place for the coolant to go was inside the motor. There was play in the water pump gear

 

i had a turbo go bad about 5 months ago and the truck sat for that time , last week had a reman turbo put on and now loosing about a gallon every 100 miles , done on the pressure test , oil/ coolant test , Hose test. What could be the problem ? Could there be something wrong with turbo? Or could the weep jokes in water pump cause this as well? No coolant leak prior to turbo being installed .