[solidirish]

Thanks again guys and I am making some progress...it's getting exciting!
Thanks Tom, I used your idea of collecting overflow in a plastic tube to a 1-gal container.I also put pans under the radiator and tail pipe end. I let engine idle at 1200 rpm in garage for 10 min.

Results below:
1) leakage....over 1 pint of coolant in bottle..started flowing immediately to bottle...no dripping below radiator, hose connections or tail pipe.
2) Temperatures in F deg using infrared.. 90 in plastic bottle, 136 below thermostat at pipe, 128 above thermostat at hose, 145 at radiator.

So it looks to me as strictly a coolant flow problem. Could it be a stuck open or partially open thermostat? I'm thinking flow shouldn't start until thermostat opens at 165 deg but flow started immediately. Any of your thoughts would be appreciated.

Ray in Illinois