Re: Bad fan clutch ?
One way is upon the first cold/cool startup, you'll hear the fan roar to life, then after several seconds, 15 to 30?, it will quiet down as in freewheeling.
When operating temp is reached, and more temp is developed, you should hear the fan lock up, hear the blade noise, feel the air move. If you don't feel or hear anything, stop the engine and reach into the front of the clutch and disconnect the outer bimetal spring tab and rotate fully CW. This action should lock up the clutch. You might have to clean the spring of debris.
If you have a strobe tach, the fan blade rpm matches the pulley rpm when the clutch is locked up.
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