I have installed the head, Water pump and thermostate/house, not manifols and a lots of other stuff so the engine cant start. I have filled water so it came out of the upper radiator tube. But after 1 Day i need to refill a litle, then after a new day i had to refill a litle again, i cant see any leaks, is it only air that got out of the system?

 

Check the oil to see if any coolant has leaked into the crankcase.
You can rent a cooling system pressure tester at the auto parts store, and attach it to the radiator in place of the radiator cap. Then pump it up to the required system pressure, and look for any coolant leaks, and watch the gauge to see if it holds the pressure.

 

yes i can do that, but i dont have the upper radiator hose or the hoses that goes to the inside warmer on right now. I thought it maybe could be some air in the cylinder head that slowly escaped through the thermostate house ?? The cylinder gasket is new and the bolts are at correct torque so i dont think the water could get to the crankcase.

 

Replace the radiator cap.

 

??? did you read my post? Sometimes its looks like peopel answer without reading the post at all.

 

The system is okey. Its was only air trapped in the system that used some dayes to get out. Yesterday there wasnt "missing" any water, i then mounted upper radiator hose and the warmer hoses. Started up for first time and did let i it warm up, the upper hose did get warm fast when the thermostate open up, now the engine is cold and i will fill up the reservoir and start it up again, it did suck in from full to add mark on the reservoir, thats the amount of water that did get in the upper hose and warmer hoses i think.