Water Pump - Chrysler 300M 2002 Service Manual

LH
RADIATOR FAN RELAY (Continued)
Fig. 26 Radiator Fan Relays - No. 1 & No. 2 (Except
2.7L Base)
1 - ELECTRICAL CONNECTOR
2 - RADIATOR FAN MOTOR NO. 2
3 - RADIATOR FAN RELAY NO. 2
4 - RADIATOR FAN RELAY NO. 1
5 - RADIATOR FAN MOTOR NO. 1
by running both fan motors in a parallel circuit.
Refer to WIRING DIAGRAMS.

WATER PUMP

DIAGNOSIS AND TESTING - WATER PUMP
A quick test to determine water pump operation is
to check for proper heater system performance (Refer
to 24 - HEATING & AIR CONDITIONING - DIAG-
NOSIS AND TESTING). A defective pump will not
circulate heated coolant through the heater hoses.
For additional diagnosis, (Refer to 7 - COOLING -
DIAGNOSIS AND TESTING). For water pump
inspection, (Refer to 7 - COOLING/ENGINE/WATER
PUMP - INSPECTION).
WATER PUMP - 2.7L
DESCRIPTION
The 2.7L pump has a die cast aluminum housing
and a plastic swept vane impeller. It bolts directly to
the cylinder block, behind the timing chain cover
(Fig. 27). The water pump is driven by the back side
of the engine primary timing chain.
Fig. 27 WATER PUMP - 2.7L ENGINE
1 - WATER PUMP BODY
2 - IMPELLER
3 - GASKET
REMOVAL
The water pump on all models can be replaced
without discharging the air conditioning system.
NOTE: It is normal for the water pump to weep a
small amount of coolant from the weep hole (black
stain at weep passage). 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 side of the cylinder block
from the weep hole passage (shaft seal failure). Be
sure to perform a thorough analysis before replac-
ing water pump.
WARNING: DO NOT REMOVE PRESSURE CAP
WITH THE SYSTEM HOT AND PRESSURIZED. SERI-
OUS BURNS FROM COOLANT CAN RESULT.
(1) Drain cooling system. (Refer to 7 - COOLING -
STANDARD PROCEDURE)
(2) Remove radiator upper crossmember. (Refer to
23 - BODY/EXTERIOR/GRILLE OPENING REIN-
FORCEMENT - REMOVAL)
(3) Remove radiator fan. (Refer to 7 - COOLING/
ENGINE/RADIATOR FAN - REMOVAL)
(4) Remove accessory drive belts. (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL)
NOTE: The water pump is driven by the primary
timing chain.
(5) Remove the timing chain and all chain guides-
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
BELT/CHAIN AND SPROCKETS - REMOVAL).
ENGINE 7 - 33