Water Pump; Diagnosis And Testing; Removal; Inspection - Chrysler PT Cruiser Service & Repair Manual

PT

WATER PUMP

DIAGNOSIS AND TESTING

WATER PUMP
A quick flow test to determine if the water pump is
working effectively is to check heater system for
proper operation. A defective pump will not provide
an adequate flow of heated coolant through the sys-
tem.
WARNING: DO NOT REMOVE THE COOLING SYS-
TEM PRESSURE CAP WITH THE SYSTEM HOT AND
UNDER PRESSURE BECAUSE SERIOUS BURNS
FROM COOLANT CAN OCCUR.
Another flow test to help determine water pump
operation is as follows:
(1) Remove cooling system pressure cap.
(2) Remove a small amount of coolant from the
system.
(3) Start the engine and warm up until thermostat
opens.
(4) With the thermostat open and coolant level low,
visually inspect for coolant flow. If flow is present,
the water pump is pumping coolant through the sys-
tem.

REMOVAL

(1) Drain cooling system (Refer to 7 - COOLING/
ENGINE - STANDARD PROCEDURE).
(2) Remove timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT AND SPROCKETS -
REMOVAL).
(3) Remove camshaft sprockets and rear timing
belt cover (Refer to 9 - ENGINE/VALVE TIMING/
TIMING BELT AND SPROCKETS - REMOVAL).
(4) Remove screws attaching water pump to
engine. Remove pump (Fig. 40).

INSPECTION

Replace water pump body assembly if it has any of
these defects:
(1) Cracks or damage on the body.
(2) Coolant leaks from the shaft seal, evident by
wet coolant traces on the pump body.
(3) Loose or rough turning bearing.
(4) Impeller rubs either the pump body or the
engine block.
(5) Impeller loose or damaged.
(6) Sprocket or sprocket flange loose or damaged.

INSTALLATION

(1) Apply Mopar Dielectric Grease to new O-ring
before installation (Fig. 41).
ENGINE - 2.0/2.4L DOHC
Fig. 40 Water Pump
1 - CYLINDER BLOCK
2 - WATER PUMP
(2) Install O-ring gasket in water pump body
groove (Fig. 41).
CAUTION: Make sure O-ring gasket is properly
seated in water pump groove before tightening
screws. An improperly located O-ring may cause
damage to the O-ring, resulting in a coolant leak.
(3) Assemble pump body to block (Fig. 40) and
tighten screws to 12 N·m (105 in. lbs.).
(4) Rotate pump by hand to check for freedom of
movement.
(5) Fill cooling system (Refer to 7 - COOLING/EN-
GINE - STANDARD PROCEDURE). Pressurize cool-
ing system to 103 Kpa (15 psi) with pressure tester
and check water pump shaft seal and O-ring for
leaks.
(6) Install rear timing belt cover and camshaft
sprockets (Refer to 9 - ENGINE/VALVE TIMING/
TIMING BELT AND SPROCKETS - INSTALLA-
TION).
(7) Install timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT AND SPROCKETS -
INSTALLATION).
7 - 59