RAM SRT-10 Pickup V10-505 8.3L (2004)
Radiator Cooling Fan Motor: Testing and Inspection
ELECTRONICALLY CONTROLLED VISCOUS FAN DRIVE
NOISE
NOTE: It is normal for fan noise to be louder (roaring) when:
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Fan duty cycle high. This may occur when ambient (outside air temperature) is very high.
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Engine loads and temperatures are high such as when towing a trailer.
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Operating conditions where transmission temperatures may be high
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Cool silicone fluid within the fan drive unit is being redistributed back to its normal disengaged (warm) position. This can occur during the first 15
seconds to one minute after engine start-up on a cold engine.
LEAKS
Viscous fan drive operation is not affected by small oil stains near the drive bearing. If leakage appears excessive, replace the fan drive unit.
