Dodge Nitro. Manual - part 523

1. Disconnect negative battery cable. 

2. Remove fan blade/viscous fan drive assembly from water pump using special tool 6958 spanner wrench, 

by turning mounting nut counterclockwise as viewed from front. Threads on viscous fan drive are 
RIGHT HAND. 

1 - SPECIAL TOOL 6958 SPANNER WRENCH
2 - FAN

NOTE:

The thermal viscous fan drive/fan blade assembly is attached (threaded) to 
fan support.

 

2007 Dodge Nitro R/T 

2007 ENGINE Cooling - Nitro

  

Fig. 58: Cooling Fan And Fan Drive Viscous Clutch Assembly & Fan Support 
Courtesy of CHRYSLER LLC 

3. Do not attempt to remove fan/fan drive viscous clutch assembly (1) from vehicle at this time.  

4. Do not unbolt fan blade assembly from fan drive viscous clutch at this time. 

Fig. 59: Identifying Idler Pulley, Cooling Fan Support, Retaining Bolts & Engine Lift Hook 
Courtesy of CHRYSLER LLC 

1 - COOLING FAN AND FAN DRIVE VISCOUS CLUTCH ASSEMBLY
2 - FAN SUPPORT

1 - IDLER PULLEY
2 - COOLING FAN SUPPORT
3 - RETAINING BOLTS

 

2007 Dodge Nitro R/T 

2007 ENGINE Cooling - Nitro

  

5. Remove fan shroud to radiator bolts.  

6. Remove fan shroud and fan blade/fan drive viscous clutch assembly as a complete unit from vehicle.  

7. After removing fan blade/fan drive viscous clutch assembly, do not place viscous clutch in horizontal 

position. If stored horizontally, silicone fluid in the fan drive viscous clutch could drain into its bearing 
assembly and contaminate lubricant.  

8. Remove four bolts securing fan blade assembly to fan drive viscous clutch.  

9. Remove cooling fan support (2) from engine block.  

CLEANING 

CLEANING 

Clean the fan blades using a mild soap and water. Do not use an abrasive to clean the blades. 

INSPECTION 

INSPECTION 

1. Remove fan blade assembly from viscous fan drive unit (four bolts).  

2. Lay fan on a flat surface with leading edge facing down. With tip of blade touching flat surface, replace 

fan if clearance between opposite blade and surface is greater than 2.0 mm (.090 inch). Rocking motion 
of opposite blades should not exceed 2.0 mm (.090 inch). Test all blades in this manner.  

3. Inspect fan assembly for cracks, bends, loose rivets or broken welds. Replace fan if any damage is found. 

INSTALLATION 

INSTALLATION 

4 - ENGINE LIFT HOOK

WARNING:

Do not attempt to bend or straighten fan blades if fan is not within 
specifications.

CAUTION: If fan blade assembly is replaced because of mechanical damage, water 

pump and viscous fan drive should also be inspected. These components 
could have been damaged due to excessive vibration.

 

2007 Dodge Nitro R/T 

2007 ENGINE Cooling - Nitro

  

Fig. 60: Using Tool 6958 To Install Fan Blade/Viscous Fan Drive Assembly To Water Pump Shaft 
Courtesy of CHRYSLER LLC 

1. Install fan blade assembly to viscous fan drive. Tighten bolts to 23 N.m (17 ft. lbs.) torque.  

2. Position fan blade/viscous fan drive assembly into the radiator shroud.  

3. Install the radiator shroud and fan drive assembly into the vehicle.  

4. Install fan shroud retaining screws. Tighten screws to 6 N.M (50 lbs. in.)  

5. Using Tool 6958, install the fan blade/viscous fan drive assembly to the water pump shaft. Tighten 

mounting nut to 50 N.m (37 ft. lbs.).  

6. Install the upper radiator hose.  

7. Fill cooling system. See STANDARD PROCEDURE.  

8. Connect battery negative cable.  

INSTALLATION-2.8L DIESEL 

 

2007 Dodge Nitro R/T 

2007 ENGINE Cooling - Nitro