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Why Does Only Toyota Use Silicone Oil Fans?

1 Answers

DeMaria

07/29/25 6:22pm

Toyota does not require high rotational speeds, hence it employs silicone oil fans. When the engine operates at low speeds, the silicone oil fan's rotation is extremely slow, resulting in minimal heat dissipation capacity for the engine at this stage. In contrast, electric fans are not influenced by engine speed variations and consistently maintain the engine temperature within an optimal range. Compared to electric fans, silicone oil fans derive their power directly from the engine, whereas electric fans are powered by separate electric motors. The engine transmits torque to the silicone oil fan via silicone oil as the medium, whose viscosity varies with temperature. This property allows the engine to monitor its temperature. Electric fans, on the other hand, detect engine coolant temperature through a thermostat to regulate the electric motor's operation. Silicone oil fans' power output fluctuates with engine temperature changes since they are engine-driven. During routine maintenance and primary scheduled servicing, inspect the fan belt tension and fastening condition. For secondary scheduled maintenance, examine the fan's operational status and troubleshoot any malfunctions.

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