Viscous Radiator Fan-Description

WARNING: This page is about a different variant/trim than selected.

Fig 1: Water Pump Mounted Fan Drive - 2.5L Engine

Courtesy of CHRYSLER LLC

1 - THERMAL VISCOUS FAN DRIVE

2 - (4) FAN BLADE-TO-VISCOUS DRIVE BOLTS

3 - (4) FAN HUB-TO-PUMP PULLEY STUDS

4 - WATER PUMP

5 - WATER PUMP PULLEY

6 - FAN BLADE

7 - (4) FAN HUB-TO-PUMP PULLEY NUTS

CAUTION: Engines equipped with serpentine drive belts have reverse rotating fans and viscous fan drives. They are marked with the word REVERSE to designate their usage. Installation of the wrong fan or viscous fan drive can result in engine overheating.

The thermal viscous fan drive is a silicone-fluid-filled coupling used to connect the fan blades to the water pump shaft. The coupling allows the fan to be driven in a normal manner. This is done at low engine speeds while limiting the top speed of the fan to a predetermined maximum level at higher engine speeds.