Radiator over heating issues causing vapour lock

Joe Asuchak offered this information about his 1931 Reo Royale Victoria Joe says his radiator had calcium, sentiment causing it to be partly plugged up which caused the engine to heat up.Joe would also have to add 1 gallon of water every 100 miles as the engine was running hot and had water coming out of the overflow pipe.He would get vapour locks in his fuel lines and the problem went away when he fixed the radiator.His temperature gauge used to run around 180 F to 190 FAfter the repair the temperature gauge ran around 160 F TO 170 FJoe took his original honey comb radiator to the local repair shop and had them install a new modern radiator core.This core had the tubes running straight up and down.The shop then attached the original top and lower radiator tanks to the new radiator core and he has had no regrets since doing it and there is a 110 % improvement in the car.Joe mentioned that he has seen antique cars where they have the new radiator cores and they have cut down the old honey comb cores to a 1/4 inch thick honey comb piece.They then attach that to the new core so when someone inspects the cars engine compartment it looks like a honey comb radiator but in fact it is just a 1/4 inch covering.Joe mentioned that Bob Brunell’s car which John P now owns. Bob sent the radiator to England about 20 years to have a new honey comb radiator built to the Royale specifications.Below is a quote from Bob in the Hemmings article about his Royale.Another big expense was the rebuilding of the radiator. He chose a shop in England that specializes in these honeycomb-style radiators; total cost, including shipping, came to $1,100.