Do not remove the cap from a hot system. Allow the system to cool,
then slowly remove the cap.
Drain the coolant.
Open the radiator drain plug and engine drain plug, and allow the coolant to
drain into a suitable container. A two gallon container is required.
Remove the accessory drive belt.
Caution
Ensure that the vehicle is properly supported and squarely positioned.
To help avoid personal injury when a vehicle is on a hoist, provide additional support
for the vehicle on the opposite end from which the components are being removed.
Jack or raise the vehicle on a hoist.
Important
The A/C compressor mounting bolts can also be removed and the compressor laid
aside to access the water pump if the pump is accessed from the top. Do not discharge
the A/C system.
Remove the right hand tire and inner wheel well splash shield.
Notice
Spray the water pump hub with a penetrating oil to loosen any rust that may
prevent the pulley from being easily removed. If the pulley is pried off the hub and
bent, it must be replaced to prevent accessory drive belt failures.
Important
A 25.4 mm (1 in) block of wood or hammer handle can be used as
a wedge between the crankshaft and water pump pulley to hold the water pump pulley
from turning when loosening the pulley bolts.
Important
Pulley bolts are removed to allow the pulley to be moved outward and allow access
to the water pump flange bolts. The pulley and pump are then removed as an assembly.
Remove te water pump pulley bolts and allow the pulley to hang freely on the
pump hub.
Remove the six water pump flange attachment bolts.
Notice
If it is difficult to remove the water pump, tap it with a gasket scraper under
the flange. Use extreme care and do not damage or scratch the machined aluminum cylinder
block. Surface leaks will result.
Remove the water pump and pulley assembly.
Remove any gasket material from the cylinder block and water pump flange.
Check that the water pump gasket surface is not cracked or damaged.
If necessary, replace the water pump.
Important
If there are signs (deposit [white film/stains]) of coolant weepage on the pump
flange or powertrain cradle below the weep hole, this does not mean the pump's seal
has failed. Only replace the pump when there is evidence of leakage such as coolant
on the pump flange, powertrain cradle, floor, or in the water pump area.
Inspect the water pump bearing.
Turn the pulley and check that the water pump bearing moves smoothly and
quietly.
If necessary, replace the water pump.
Check the impeller for shaft retention and pitting.
Check the water pump weep hole for signs of leakage from the water seal.
Make sure the weep hole is open and not plugged with grease.
Tighten the water pump-to-block to 30 N·m (22 lb ft).
Important
If the pump pulley hub end extending through the pulley is rusty, clean it with
a wire brush and apply a thin coat of primer paint to prevent the pulley from rusting
on the hub.
Install the pulley on the pump hub. The pulley can be held using a strap wrench,
block of wood, or hammer handle.
Tighten
Tighten the water pump pulley-to-water pump hub to 25 N·m (19 lb ft).
