Unfortunately, after I changed my head gasket, I am still overgheating on a track . Read my original thread https://honda-tech.com/zerothread?id=826260 .

Today, my heating and interior fan was set to max and I was still overheating - when I saw one bar over middle, I had to slow down. When it went down to middle, I ran hard again, but after about 2 minutes, it raised one bar up again

I just need your help again guys. I assume I will remove and test the thermostat first, even if it looks like operating.