Which of the following is NOT a function of the cowl?

The function of the cowl encompasses several important roles that contribute to vehicle performance and safety. One key function is directing airflow to the windshield, which helps maintain visibility during rainy or windy conditions. Additionally, the cowl supports the wiper system, providing a stable mounting point that ensures effective operation of windshield wipers.

Furthermore, the cowl plays a crucial role in passive safety by forming a barrier in the event of a collision, absorbing impact forces and enhancing the structural integrity of the vehicle's front end. However, providing insulation against heat is not traditionally considered a primary function of the cowl. While some heat management might incidentally occur due to its location and materials, the primary design and purpose of the cowl do not focus on thermal insulation. Thus, identifying that the cowl does not primarily function to insulate against heat explains why this option is the correct choice.