good luck on that bubble rid. but couldn't you just leave the radiator cap open and let the engine run?
:and for the next couple of days, I will try to bleed more air out of the cooling system. I bought some water and will fill the radiator after squeezing the radiator hose several times to coax air bubbles out. It's running on Nissan Coolant right now at the proper mix. I remember that I had Redline Water Wetter added before. If there is no more air to bleed, then I'll try the WW. Hope it's just air bubbles. *sigh* It's so stinking hot out here in AZ.