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(3) Do not attempt to remove fan/viscous fan drive assembly from vehicle at this time. (4) Do not unbolt fan blade assembly from viscous fan drive at this time. (5) Remove the fan shroud mounting bolts. fan drive assembly as a complete unit from vehicle. (7) After removing fan blade/viscous fan drive assembly, do not place viscous fan drive in horizon- CAUTION: Do not attempt to remove the fan pulley (7) Remove four bolts securing fan blade assembly to viscous fan drive (Fig. 23). FAN BLADE INSTALLATION (1) Install fan blade assembly to viscous fan drive. Tighten bolts (Fig. 23) to 23 N·m (200 in. lbs.) torque. (2) Position fan shroud and fan blade/viscous fan drive assembly to vehicle as a complete unit. (3) Install and tighten fan shroud bolts to 3 N·m (31 in. lbs.) torque. (4) Install fan blade/viscous fan drive assembly to fan pulley shaft (Fig. 23). (5) Connect the negative battery cable. VISCOUS FAN DRIVE Refer to the FAN BLADE removal and installation procedure for replacement of the viscous fan drive. The thermal viscous fan drive (Fig. 24) is a sili- cone-fluid-filled coupling. It connects the fan blade The viscous fan drive will only engage when suffi- cient heat is present. This is when the air flowing Once the engine has cooled, the radiator discharge temperature will drop. The bimetallic coil again Fig. 23 Thermal Viscous Fan Drive and Blade Assembly 1 – FAN PULLEY Fig. 24 Viscous Fan Drive 1 – MOUNTING NUT TO FAN PULLEY SHAFT 7 - 24 COOLING SYSTEM WJ REMOVAL AND INSTALLATION (Continued) 2000 JEEP GRAND CHEROKEE |