Whenall this started i borrowed a 22 piece test kit from Advance. Not a single one of the adapters in the kit would fit the radiator or the cap. Just for fun I checked the 1995 Ford. No go. The kits available don't seem to have adapters for the big "normal" radiator caps found on just about everything from 2000 on back.

It's a new cap. What are the odds that a new cap would cause the exact problem as the old cap? Probably pretty slim.

Both caps have poppets for use with coolant recovery tanks. The coolant recovery system has been working perfectly for three years.

2 gallons of coolant boiled out. It wasn't just a normal release into the recovery tank.

I keep the radiator filled to the top with coolant in the recovery tank at the cold line. For three years the gauge has stayed more or less at 180 and the coolant reservoir rises and falls normally without boiling or overflowing.

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)