'96 Honda Civic. That actually sounds like the best possibly reasonable explanation I've heard so far and Ty- for the suggestion. I'll be looking into that, the jacking up passenger side was a surprise yes, it's been really strange, probably explains the burbling I hear sometimes & sudden temp changes I read the system with a BT ODB2 unit($15) & TorquePro.apk. New radiator and cap included in the change outs. Ty- again, bro!
You're welcome I can't guarantee that will definitely fix the problem, but maybe bring you a step closer somehow. Sometimes all it takes is tilting a car just the right way to guide the air towards the top of the radiator.
You may save yourself some time taking a peek in the Honda forums or in the FSM to see if there are indeed bleed valves somewhere on your engine. I left the auto repair trade back in 1999 to pursue A/C repair and HVAC, so most of my detailed foreign auto knowledge stayed behind with it. Chrysler was one of my stronger areas of knowledge, and was pretty much what I drove for a long time.
But recently I've smartened up. I now own a Honda Ridgeline and a Toyota Sienna. Only one 1999 Caravan left to junk and I'm officially Mopar-free