Water Pump—5.2L/5.9L Engines - Dodge 2000 DURANGO Service Manual

DN
SERVICE PROCEDURES (Continued)
from water pump and attach a lead-away hose to
water pump inlet fitting.
CAUTION: On vehicles equipped with a heater
water control valve, be sure heater control valve is
closed (heat off). This will prevent coolant flow with
scale and other deposits from entering heater core.
Connect water supply hose and air supply hose to
flushing gun. Allow engine to fill with water. When
engine is filled, apply air in short blasts, allowing
system to fill between air blasts. Continue until clean
water flows through the lead away hose.
Remove lead away hose, flushing gun, water sup-
ply hose and air supply hose. Remove thermostat
housing and install thermostat. Install thermostat
housing with a replacement gasket. Refer to Thermo-
stat Replacement. Connect radiator hoses. Refill cool-
ing system with correct antifreeze/water mixture.
Refer to Refilling the Cooling System.
CHEMICAL CLEANING
In some instances, use a radiator cleaner (Mopar
Radiator Kleen or equivalent) before flushing. This
will soften scale and other deposits and aid flushing
operation.
CAUTION: Follow manufacturers instructions when
using these products.
REMOVAL AND INSTALLATION
COOLANT RESERVE/OVERFLOW TANK
NOTE: The coolant reservoir/overflow tank is inte-
geral to the upper fan shroud. Refer to Fan Shroud
in this section for proper removal/installation proce-
dures.
WATER PUMP—5.2L/5.9L ENGINES
REMOVAL
The water pump can be removed and installed
without discharging the air conditioning system (if
equipped).
(1) Disconnect battery negative cable.
(2) Drain cooling system. Refer to Cooling Sys-
tem—Draining and Filling in this group.
(3) Do not waste reusable coolant. If solution is
clean, drain coolant into a clean container for reuse.
WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUMBER
6094) (Fig. 38). SNAP-ON CLAMP TOOL (NUMBER
HPC-20) MAY BE USED FOR LARGER CLAMPS.
ALWAYS WEAR SAFETY GLASSES WHEN SERVIC-
ING CONSTANT TENSION CLAMPS.
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 39). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.
(4) Remove upper radiator hose clamp and hose at
radiator.
(5) The thermal viscous fan drive is attached
(threaded) to the water pump hub shaft (Fig. 29).
Remove fan/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) and Special Tool 6958 Span-
ner Wrench with Adapter Pins 8346 can be used.
Place Special Tool 6958 Spanner Wrench onto the
water pump pulley with Adapter Pins 8346 inserted
into the holes on the pulley (Fig. 28) to prevent pul-
ley from rotating. Do not attempt to remove fan/vis-
cous fan drive assembly from vehicle at this time.
Fig. 28 Viscous Fan Drive Removal / Installation
1 – SPECIAL TOOL 6958 SPANNER WRENCH WITH ADAPTER
PINS 8346
2 – FAN
COOLING SYSTEM 7 - 25