Losing antifreeze while running

[Stephen valliere]

Starbord engine Cummins 6BTA which has been fully rebuild, new block, head, internals, exhaust manifold ect now when i have test run it for short durations basically couple hours i lose all antifreeze. There are no visible hose leaks or antifreeze in engine room. What is the possible issue Head gasket ?????  turbo leak by???? any ideas tony to help trouble shoot. The coolant system pressure test is 100% fine at cold. 

Topic

[donald roth]

Head gasket, cracked manifold, turbo gasket are initial suspects, IMO.      <br />Id do the coolant pressure test again, on a hot motor.             <br />Is the engine running well?  Injector break test done? <br />It must have overheated radically if it ran clear out of coolant!

 

[Tony Athens]

You loose all the antifreeze is a couple of hours and it pressure tested OK when cold?   Describe “all”  as the engine holds 4+ gallons. 

 Something is missing here. 

Post good pics of the engine from all around

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