Chrysler Concorde 2004 Service Manual page 1582

7 - 36 ENGINE
WATER PUMP - 3.5L
DESCRIPTION
The 3.5L water pump has a die cast aluminum
housing and a plastic swept vane impeller. It bolts
directly to the right rear timing belt cover using an
O-ring for sealing (Fig. 32). The water pump is
driven by the engine timing belt.
REMOVAL
The water pump on all models can be replaced
without discharging the air conditioning system.
WARNING: DO NOT REMOVE PRESSURE CAP
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
NOTE: It is normal for the water pump to weep a
small amount of coolant from the weep hole (black
stain on water pump body). Do not replace the
water pump if this condition exists. Replace the
water pump if a heavy deposit or a steady flow of
engine coolant is evident on water pump body from
the weep hole (shaft seal failure). Be sure to per-
form a thorough analysis before replacing water
pump.
(1) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(2) Remove accessory drive belts (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
NOTE: The water pump is driven by the timing belt.
(3) Remove engine timing belt (Refer to 9 -
ENGINE/VALVE TIMING/TIMING
SPROCKETS - REMOVAL).
(4) Remove water pump mounting bolts (Fig. 31).
Note position of longer bolt for proper re-installation.
(5) Remove water pump body from engine (Fig.
31).
1 - SCREWS
2 - WATER PUMP BODY
INSPECTION
Inspect and replace the water pump if it has any of
the following defects:
(1) Damage or cracks on the pump body.
(2) Coolant leaks; if the seal is leaking, this will be
evident by traces of thick deposits of dried glycol run-
ning down the pump body and components below. A
thin black stain below pump weep hole/passage is
considered normal operation.
(3) Impeller rubs inside of the rear timing belt
cover.
(4) Excessively loose or rough turning bearing.
NOTE: It is normal for the water pump to weep a
small amount of coolant from the weep hole (black
stain on water pump body). Do not replace the
water pump if this condition exists. Replace the
water pump if a heavy deposit or a steady flow of
engine coolant is evident on water pump body. This
BELT AND
indicates a shaft seal failure and pump must be
replaced. Be sure to perform a thorough analysis
before replacing water pump.
Fig. 31 WATER PUMP - 3.5L ENGINE
LH