White Smoke From Exhaust - Blown Head Gasket?

[pphan3]

Not too long ago I came home with smoke coming from under the hood of my 2009 hyundai genesis 4.6 with 100K miles. There was coolant spewing out of the upper radiator hose at the connection near the throttle body. After running the diagnostic scan tool, there was an error that the thermostat and coolant sensor were bad. I went ahead and replaced the thermostat, water pump, and coolant sensor. While burping the coolant, I noticed light smoke (white in color) coming out of both of my exhausts. This smoke was visible even after running the car for 30 mins. Air bubbles were still visible in my coolant no spill funnel after 30 mins. I ran the combustion tester on the funnel that was plugged into the radiator cap and the dye color remained blue. After turning off the car, I checked the engine dipstick and oil cap and the oil looked normal (not milky).

Does this white smoke indicate a blown head gasket? What next steps should I do?

 

[Gunkk]

A compression + leak down test would identify any cylinders with loss of compression from a failed head gasket or other loss of integrity. Also, heads and blocks can crack, and give coolant another way to get into the combustion chamber than the gasket. So while the plugs are out, a bore scope inspection should be able to confirm the suspect holes showing a washed clean piston top.