The first step for servicing the electric cooling fan and viscous fan is to disconnect the negative battery cable from the battery. The fan drive on the 4.0L engine can be removed without using adapter 6958 or special tool wrench 8346. On the water pump, the viscous fan drive/
Fan Blade assembly threads onto the hub shaft; to remove it, unscrew the mounting nut counterclockwise, since the threads of the viscous fan drive rotate to the right. Spanner wrench 6958 and adapter pins 8346 should be used with a fitting fan wrench when dealing with the 4.7L fan drive. Do not try to take either the fan/viscous fan drive assembly or the fan blade assembly apart from the car yet. After that, loosen and remove the nuts keeping the fan shroud to the upper crossmember and pull out the fan shroud with the fan blade/viscous fan drive attached. Avoid having the fan drive's gasket at the bottom when you sit it up, so the silicone doesn't get into the bearing assembly. Take care not to take out the bolts from the water pump pulley, since the pulley is under belt tension. Take out the four bolts that fasten the fan blade assembly to the viscous fan drive, attach the fan blade assembly to the viscous fan drive and bolt them back on until you reach 23 Nm (17 ft. lbs.) of torque. First, set the fan shroud and fan blade/viscous fan drive assembly into the vehicle. On the lower part of the shroud, make sure alignment tabs slot into the
Radiator slots. Then, tighten the two fan shroud-to-upper-crossmember nuts, keeping the distance between the fan tips and fan shroud's edge at least 1.0 inches. After that, fix the fan blade/viscous fan drive assembly onto the water pump shaft and put the negative battery cable back on. Electric fans are serviced completely as one unit.