How to Test For a Worn Fan Clutch
Contributed by:Rod Linnett
This is the documentation that came with the new fan clutch I recently had to replace. Remember that these words are not mine - they come from the manufacturer of the fan clutch (Amgauge - Arlington TX 76011)
The fan clutch is designed to provide limited fan movement when the engine does not require cooling, therefore saving fuel and reducing fan noise. The graph shows how fan speed increases in direct proportion to RPM's, whereas with a fan clutch the engine still generates fixed RPM's while the fan drives at a lower speed such as highway driving, cooling effect from the fan is not required due to the air flow through the radiator cooling fins.
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