Which one of the following components is NOT part of the radiator support?

The radiator support is a crucial component in a vehicle's structure that serves to maintain the position and alignment of the radiator, as well as to provide additional structural support. Within the radiator support assembly, there are several specific components that play different roles.

The radiator itself is an essential part of the vehicle's cooling system, responsible for dissipating heat from the engine coolant. However, it is not considered a part of the radiator support structure itself. Instead, the radiator is mounted to the radiator support, which provides the necessary framework to hold the radiator in place securely.

In contrast, the lower tie bar, upper tie bar, and side baffles are integral components of the radiator support assembly. The lower tie bar helps to link the lower part of the support structure and adds to the rigidity of the assembly. The upper tie bar serves a similar purpose at the top of the support, connecting the sides and providing structural integrity. Side baffles assist with airflow management and help direct air through the radiator for improved cooling efficiency.

Thus, identifying the radiator as not being a part of the radiator support is correct as it functions independently yet is connected to the support structure.