The Nissan Murano Radiator fan serves to regulate engine temperatures by pulling fresh air through the front-mounted radiator when traffic is crawling or when the SUV is idling. An electricity-driven component, the Radiator fan is positioned within a shroud adjacent to the radiator core. It features composite blades designed to rotate in unison. As the blades spin, air is drawn toward the fins, facilitating the dissipation of heat from the engine coolant that circulates within the radiator. When traveling at highway speeds, cooling is accomplished through natural airflow via the grille. But as the vehicle slows, it can no longer get adequate airflow, and thus the Radiator fan becomes the primary source of air to prevent rapid temperature spikes from occurring. Earlier Nissan models sometimes relied on a belt-driven mechanical fan that turned with engine rpm. However, every Murano generation has the electric type which reacts instantly to temperature signals and will run regardless of engine speed. The changeover from mechanical to electric cut noise, enhanced fuel economy, and enabled the control module to operate the Radiator fan only at sensor demand for extra air. The motor, blades, and molded shroud are all combined into one unit that slides against the radiator assembly and is a similar layout across the Nissan lineup adapted for Murano bay. Since this Radiator fan draws cool ambient air directly through the core, the coolant temperature stays stable, protecting vital engine parts during summer traffic or long uphill climbs.
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