09 series 60 using antifreeze

My star just started going through antifreeze I'd say 2 liters a day. It's a Detroit series 60. No visible leaks, no white smoke, no noticeable rise in oil I've sent away an oil sample not back yet. I took off the exhaust from bellows pipe to dpf looks good. I have a homemade bottle on the rad tank overflow it doesn't seen to be pushing any out there. Any suggestions..

 

No..

 

I park in my shop so every morning I check for leaks on the floor around the engine I see nothing.. I'm thinking egr cooler I do see a little white on the exhaust side of cooler I need to have that pipe taken off and that checked.

 

Tks I'm going to get the egr to cooler checked this morning. I guess these engines are also known for the intake side manifold cracking. That might be next..

 

Possibly.. I'm getting that checked out Tuesday as well as the possibility of a cracked head...

 

It was the egr cooler.