Dodge 2000 DURANGO Service Manual page 228

7 - 26 COOLING SYSTEM
REMOVAL AND INSTALLATION (Continued)
Fig. 29 Fan Blade and Viscous Fan Drive—5.2L/5.9L
1 – WATER PUMP BYPASS HOSE
2 – FAN BLADE ASSEMBLY
3 – VISCOUS FAN DRIVE
4 – WATER PUMP AND PULLEY
(6) If water pump is being replaced, do not unbolt
fan blade assembly (Fig. 29) from thermal viscous
fan drive.
(7) Remove fan shroud attaching hardware (two
bolts at bottom-two clips at top).
(8) Remove fan shroud and fan blade/viscous fan
drive assembly from vehicle as a complete unit.
(9) After removing fan blade/viscous fan drive
assembly, do not place thermal viscous fan drive in
horizontal position. If stored horizontally, silicone
fluid in viscous fan drive could drain into its bearing
assembly and contaminate lubricant.
(10) Remove accessory drive belt as follows: The
drive belt is equipped with a spring loaded automatic
tensioner (Fig. 30). Relax tension from belt by rotat-
ing tensioner clockwise (as viewed from front) (Fig.
30). When all belt tension has been relaxed, remove
accessory drive belt.
(11) Remove lower radiator hose clamp and remove
lower hose at water pump.
(12) Remove heater hose clamp and heater hose
from heater hose coolant return tube.
(13) Loosen heater hose coolant return tube
mounting bolt (Fig. 31) and remove tube from water
pump. Discard the old tube O-ring.
(14) Remove seven water pump mounting bolts.
(15) Loosen clamp at water pump end of bypass
hose (Fig. 29). Slip bypass hose from water pump
while removing pump from vehicle. Discard old gas-
ket.
CAUTION: Do not pry water pump at timing chain
case/cover. The machined surfaces may be dam-
aged resulting in leaks.
Engines
Fig. 30 Automatic Belt Tensioner Assembly—5.2L/
5.9L Engines
1 – IDLER PULLEY
2 – TENSIONER
3 – FAN BLADE
INSTALLATION
(1) Clean gasket mating surfaces.
(2) Using a new gasket, install water pump to
engine as follows: Guide water pump nipple into
bypass hose as pump is being installed. Install water
pump bolts. Tighten water pump mounting bolts to
40 N·m (30 ft. lbs.) torque.
(3) Position bypass hose clamp to bypass hose.
(4) Spin water pump to be sure that pump impel-
ler does not rub against timing chain case/cover.
(5) Install a new O-ring to the heater hose coolant
return tube (Fig. 31). Coat the new O-ring with anti-
freeze before installation.
(6) Install coolant return tube and its mounting
bolt to engine (Fig. 31). Be sure the slot in tube
bracket is bottomed to mounting bolt. This will prop-
erly position return tube.
(7) Connect radiator lower hose to water pump.
(8) Connect heater hose and hose clamp to coolant
return tube.
(9) Relax tension from belt tensioner (Fig. 30).
Install accessory drive belt.
DN