Rick's Free Auto Repair Advice

Posts Tagged: active grille shutter assembly

Active Grille Shutter

How does the Active Grille Shutter work? Purpose of the active grille shutter The active grille shutter assembly accomplishes three things: 1) Improves aerodynamic efficiency at higher speeds by forcing airflow over the hood, 2) Improves emissions by blocking airflow across the radiator at cold startup to speed up engine warmup, and 3) increasing passenger comfort by blocking airflow across radiator to improve coolant heat retention. As carmakers downsized engines to improve fuel economy they ran into a problem with cabin heat. Smaller engines require less coolant, so in cold … Read More


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