Thermostat?

[parb]

I think I had air in the system. I added a bit of more antifreeze, and while it burped up a little bit more than my overflow container could handle (just a few drops really) it seemed to work. I've now been running the engine for a while and it seems to have done the trick.

Drove it on a mix of surface streets and highway just to be sure and half an hour later the temp gauge has solidly stayed at the mid point. It wasn't even that much anti freeze that I added but it seems to have cured the problem.

The IR temp reader reads 185 -190 going into the radiator (on a metal surface) and about 140-150 on the hose returning coolant to the engine. This is with an engine that is running and has been at operating temperature for a while.

I'm sure I have a 180 thermostat due to these readings. All seems well.