Katttfishh, If you break the neck to the radiator's upper-plastic header tank, locate a radiator repair shop that rebuilds them and have the header tank replaced. Far less expensive than buyiny a whole new radiator (obviously assuming that the rest of the radiator is in good shape). I've been through this experience already. Behr is (I believe) the manufacturer of most M-B radiators, and the Behr replacement header tank used to repair mine has a brass reinforcement sleeve inside the neck to preclude the plastic neck from ever breaking again. Enuff said ?? Hope this helps. Fred.