This was how my 500 inch Coronet acted with a brand new champion radiator in it. Switched to a Griffin 2 core with 1.25 inch tubes and that fixed it. What brand radiator do you have?.
Same here, bought a brand new 3 row 340 replacement radiator...it ran HOT...so i gambled on a BWM cross flow 1 row aluminum with with over an inch of tube/core diameter and bingo, thing runs nice n cool, i got to go down in fan size after that too which is always good for the impeller bearings on the pump.lol
