I changed out that pain in the *** radiator last night and filled it with new 50/50 premix fluid and through in a bottle of a coolant additive for good measure. I was debating on changing out the thermostat but since I had it tore down I went ahead and did it and thank God i did because the one that was in there had broken apart. The bottom part was in the neck the spring was on top if it and was holding up the " Flying Saucer" looking top. When everything was buttoned up and filled I started the car to get the air bubbles however instead I got a bunch of little ones almost looking like bubble bath. Is this normal or could it be from the additive? Also it took a while for the thermostat to open up as a matter of fact the fans came on and the top rad hose was still cool to the touch.

 

It could be the additive, but usually when you get lots of little bubbles, it means the water pump is bad.