Stop in for a cup of coffee

My Subaru job came back this morning. Ran hot. New thermostat, rad cap, water pump. Want to make it right for the customer. Found out, these flat 4's have air in the coolant problems. Been working for a few hours now, trying to get all the air out. Think I did it. Been sitting in my shop idling for 45 mins now.. Hope thats all it is.....