Foaming in Radiator

Yeah, I just checked the oil and it looks fine. The radiator looks OK too now that it is cool. Also It is not getting hot at all. I can put my hand on the valve cover after it has been running for half an hour and it is just warm.
I flushed the whole system a few months ago when I replaced the radiator, water pump and thermostat. The temp gauge has not worked since though.

You guys were getting me scared there.

Also I just remembered that I had put in a lot of stopleak before I replaced the radiator. I bet there is residue from that in the block still.