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 replacing water pump.
WARNING: Do not remove pressure cap with the system hot and pressurized. Serious burns from coolant can result.
Drain cooling system. (Refer to STANDARD PROCEDURE - COOLING SYSTEM DRAINING )
Remove radiator upper crossmember.
Mark bolt locations on the radiator upper crossmember.
Remove bolts attaching windshield washer bottle and speed servo, if equipped. (Refer to Fig. 41.)
Remove headlamp jackscrews both sides.
Remove fasteners attaching upper bumper fascia.
Remove bolts attaching the upper forward edge of upper radiator closure panel.
Remove bolts attaching upper radiator closure panel
Disconnect hood latch cable from hood latch.
Remove upper radiator closure panel from vehicle.
For replacement of upper radiator upper crossmember, remove hood latch, and any other hardware.
Remove radiator fan. (Refer to RADIATOR FAN ASSEMBLY )
Remove accessory drive belts. (Refer to DRIVE BELTS - 2.7L )
NOTE: The water pump is driven by the primary timing chain.
Remove the timing chain and all chain guides (Refer to TIMING BELT/CHAIN AND SPROCKETS ).
Remove bolts attaching water pump to block (Fig. 56 ).
Fig. 56: Removing Water Pump (2.7L)
Courtesy of DAIMLERCHRYSLER CORP.
Remove water pump and gasket