C15 Blowing coolant but no hydrocarbons

I have a c15 6NZ and I'm having problems with with coolant blowing out of my reservoir.It does not run hot or have any signs of a blow head gasket.I have the block tester kit to test for hydrocarbons in the system and it has none present.i have done the test 3 times with the last one putting the coolant overflow hose into a bottle with the blue fluid in it so the bubbles would be in the fluid.I think I'm Fighting a Air pocket problem since this problem seamed to start when I changed the thermostats.I have drained all the air out of the system and bypasses the air compressor to eliminate a bad compressor.Any Ideas?

2003 Kenworth T2000
6NZ

 

I put a new cap on when i did the thermostats and there is a air bleed hose that comes off of the thermostat housing to the reservoir tank to bleed air.

 

Have swap caps from another truck that's has no problems and is still doing it.The fluid I used is for both gas and diesel it changes from Blue to green for diesel and blue to yellow for gas.I have checked the hose from thermostat housing and it is flowing a lot no blockage there.I don't know how much should be flowing thur that little hose for the air bleed but it is maxed out.The other air bleed hose that comes off the top of the radiator has no flow but is not restricted.

 

Link to video I used the test kit the right way but then did this.If the air is from the head gasket it should turn color.