I did not remember the bubbles until last night when one of my motor head friends asked if I'd ever seen such. It was a really long time ago...well, long to me anyway. I had been driving it, got home and wanted to check the water temp. I didn't have a heat gun yet. Took off the rad cap...very carefully !....and saw the bubbles...very tiny but constant. Used a meat thermometer (don't tell my wife) to ck water temp.
