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Old 02-25-2000, 03:54 PM
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Join Date: Apr 1999
Location: Apex, NC USA
Posts: 176
The manual states the fan clutch engages when the engine operating temperature is about 95 C. It also states that it can be clearly heard. I don't seem to be able to tell the difference or the clutch has failed. Further a sheet of kleenex barely clings to the aux fan housing when the engine has reached almost 100C.

Am I nuts or is the fan clutch a goner?

1991 350 SDL
114,000 miles

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Old 02-25-2000, 10:26 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The fan clutch on this car will not positively engauge, but rather will come on slow. The aux fans should run above the 105-110mark. Also the fans will come on with the A/C on when the temp on the condensor is up.

1981 280GE SWB
1987 16V

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Old 02-26-2000, 10:43 AM
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Join Date: Apr 1999
Location: Apex, NC USA
Posts: 176
Unfortunately the fan seemed to run at the same speed from about 85 - 100C. The aux fans work fine on both high and low speeds.

Shouldn't the clutch speed things up in that temp range?

1991 350 SDL
114,000 miles

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