This procedure is known to me, but i read some time agow nissan TSB, about this. Now i miss link to this TSB.
The air bleed port plug dont bleed all air bulbs. And nissan recomend lift front of the vehicle about 3 feets, open radiator cap, and race engine ~2000 rpm about 10 minutes, until air bulbs comes out from radiator. After that fill radiator fully, close radiator cap and fill coolant tank to MAX level.
I not 100% sure in this, but i look for link to this TSB