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11-5
PART
11-2
WATER PUMP
Section
1 Description and
Operation
2 Removal
and Installation
Six
C~·
linde
r
Engines
V8 Engines
Page
11-5
11-5
11-5
11-5
Section
3
Major Repair Operations
Six Cylinder
Engines
V8
Engines
Fan Drive Clutch
Page
11-6
11-6
11-8
11-8
D
DESCRIPTION AND OPERATION
On 6-cylinder engines, a centri-
fugal-type water pump is
mounted
on the front of
the
cylinder
block.
On V-8 engines,
the
centrifugal-type
water pump is mounted
on the
cylinder front cover. The water
pump
inlet port is connected
to the radiator
bottom tank to
draw
coolant
from
the radiator when the
thermostat is
open.
On the V -8 engines,
a bypass
port on the water
pump is connected
to the coolant
outlet housing to
permit coolant circulation
within the
engine when the thermostat is closed,
bypassing the radiator. On the 6-
cylinder
engines, the water pump
bypass passage is aligned with the
bypass passage in the cylinder block
for coolant
circulation
in
the engine
when
the thermostat is dosed.
A
vane-type,
impeller supplies
coolant
through centrifugal action
to the
water
pump outlet port on
6-cylinder engines. On the V-8 en-
gines, the water pump has two out-
El
REMOVAL AND INSTALLATION
SIX CYLINDER ENGINES
REMOVAL
1.
Drain the cooling
system.
On
a car with
power
steering.
remove the power steering
drive belt.
2. Disconnect the
radiator lower
hose
at the
water pump. Remove
the drive
belt,
fan,
spacer and
water
pump
pulley.
3. Disconnect the
heater hose
at
the water
pump.
4. Remove
the water
pump.
INSTALLATION
1.
Clean the
gasket
surfaces
on
the
water pump
and cylinder block.
l.
Coat a new
gasket on both
sides with water-resistant sealer
and
position
it on
the
cylinder
block.
3. Position the water pump in
place
and install
the lock washers
and retaining bolts (the alternator
adjusting arm
is
retained
by one
water pump
·
bolt).
Torque
the bolts
lO
specifications.*
4. Connect
the
radiator
lower
hose
and
the heater hose to the water
pump.
5. Install the
water
pump pulley,
fan
spacer
and fan
.
Torque the
bolts
evenly and
alternately to
specifications.
6. Install ihe drive belt and ad-
just the tension to
specifications.
On a car with power steering, in-
stall
the drive belt and adjust the ten-
sion
to
specifications.
On a car
with
air conditioner, in-
stall
the compressor drive belt and
adjust
the tension to
specifications.
7.
Fill and bleed the cooling sys-
tem
.
Operate the engine until normal
operating temperature is reached.
Check for leaks and check the
coolant level.
V-8 ENGINES
REMOVAL
1. Drain the cooling system and
disconnect the battery.
2. Remove the fan shroud attach-
let ports, one
for
each cylinder bank,
to provide uniform
coolant circula-
tion in both banks of the engine.
The water pumps have a
sealed
bearing integral
with
the water
pump shaft. The bearing
requires
no
lubrication. A bleed hole in the
water
pump housing allows
water
that may
leak past the seal to be thrown out
by the slinger. This is not a lubri-
cation hole.
The cooling fan hub
is
pressed a
specified distance onto
the
water
pump shaft.
ing bolts and pos1t1on the shroud
rearward if so equipped.
3. Remove the fan and spacer from
the water pump shaft.
4. Remove the air conditioner
compressor drive belt lower
idler
pulley and compressor mount to
water pump bracket, if so equipped.
5. Loosen the alternator and re-
move the drive belt.
6. If equipped with power steer-
ing, loosen the power
steering
pump
and remove the drive belt.
7. Remove the water pump pulley.
8. Remove alternator bracket from
water pump and position it out of the
way.
9.
If.
equipped with power steer-
ing, remove the power steering pump
bracket from the water pump and
position it out of the way.
10. Remove the heater hose from
the water pump.
11. Disconnect the lower radiator
hose at the water pump.
12. Remove the water pump at-
*
CAUTION:
-When
installing pump retaining bolts ensure that the longest bolt is fitted to
the
hole where the alternator
mounting
bracket
is located,
otherwise damage to the engine block will occur.
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