The newer radiators have a metal insert in the neck to prevent them from breaking off, however, I am unsure of the year that the changes were made.

Does anyone know what year they started putting the metal insert in the neck of the radiator?

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record