Durango 4WD V8-5.9L VIN Z (1998)
Fan Clutch: Service and Repair
REMOVAL
For additional information, also refer to Viscous Fan Drive.
1. Disconnect battery negative cable.
2. The thermal viscous fan drive/fan blade assembly is attached (threaded) to water pump hub shaft. Remove fan blade/viscous fan drive assembly
from water pump by turning mounting nut counterclockwise as viewed from front. Threads on viscous fan drive are RIGHT HAND. A Snap-On
36 MM Fan Wrench (number SP346 from Snap-On Cummins Diesel Tool Set number 2017DSP) can be used. Place a bar or screwdriver between
water pump pulley bolts to prevent pulley from rotating.
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 fan shroud attaching hardware (two bolts at bottom-two clips at top).
6. Remove fan shroud and fan blade/viscous 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 horizontal position. If stored horizontally, silicone fluid in
the viscous fan drive could drain into its bearing assembly and contaminate lubricant.
Fan Blade/Vicous Fan Drive
CAUTION: Do not remove water pump pulley-to-water pump bolts. This pulley is under spring tension.
8. Remove four bolts securing fan blade assembly to viscous fan drive).
INSTALLATION
1. Install fan blade assembly to viscous fan drive. Tighten bolts to 23 Nm (17 ft. lbs.) torque.
2. Position fan shroud and fan blade/viscous fan drive assembly to vehicle as a complete unit.
3. Install fan shroud.
4. Install fan blade/viscous fan drive assembly to water pump shaft and tighten bolts to 27 Nm (20 ft. lbs.).
5. Connect battery negative cable.
Viscous Fan Drive Fluid Pump Out Requirement: After installing a new viscous fan drive, bring the engine speed up to approximately 2000 rpm
and hold for approximately two minutes. This will ensure proper fluid distribution within the drive.
