Post 1 of 12 old 04 04 2012 05 11 pm.
Jeep tj fan clutch test.
Because they transfer huge amounts of energy from the engine to the transmission using pressure and friction these parts are not long for this world.
How can i test the fan clutch to see if it s operating properly.
This is a test.
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If the fan cannot be rotated by hand or if there is a rough grating feel as the fan is turned the clutch should be replaced.
Fan noise or an excessive roar will generally occur continuously however under all high engine speed conditions 2500 rpm and up if the clutch assembly is locked up due to an internal failure.
Fortunately this is a very easy task to do but like any job the right tools can make all the difference.
To test whether or not your fan clutch needs to be replaced simply spin your jeep s fan by hand while the engine is cold and if it spins freely 5 rotations or more it will need to be replaced.