No, I used a normal one. However, it was all for nought.

Buttoned everything up and tested it for ~20 miles. No overheating, no leaking. Temp range stayed within acceptable parameters as tested with infrared thermometer at upper hose, T stat, etc.

Drive to 10 mi to Roswell for gas, no overheating, no problems.

Drive 30 miles home - coolant is boiling out of the overflow tank.

I'm pretty dejected now after all the work - rebuilt pump, cleaned out radiator, new t stat and radiator cap. etc.

No water in oil. No apparent leaks , although I'll fill it up with water this weekend and observe it in the driveway. Engine starts right up with no funkiness and drives like normal.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)