Water Pump Tests; Installation—Eight-Cylinder Engine - Jeep J-10 Series 1982 Technical & Service Manual

1C-8 COOLING SYSTEMS
A/C COMPRESSOR/WATER
PUMP MOUNTING STUD
POWER STEERING/WATER
PUMP MOUNTING BOLT
60473
Fig. 1C-4 Water Pump Removal—Eight-Cylinder Engine with A/C
Installation—Eight-Cylinder Engine
NOTE: Check timing case cover for erosion damage
caused by cavitation.
(1) Install water pump and replacement gasket on
timing case cover.
(2) Tighten retaining screws to specified torque.
(3) If removed, install front section of power steer
ing mount bracket, power steering pulley and drive belt.
(4) Tighten drive belt to specified tension, then
tighten pulley retaining nut with 55 to 60 foot-pounds
(75 to 81 N«m) torque.
(5) Install air pump drive belt, if removed, and
tighten to specified tension.
(6) Install alternator and mount bracket assembly.
(7) Connect heater hose, bypass hose and lower
radiator hose to water pump.
CAUTION: Ensure the wire coil (spring) is installed in
the lower radiator hose. Failure to install this coil will
result in the hose collapsing when the engine is oper
ating with high rpm.
(8) Position shroud against front of engine and in
stall engine fan and hub assembly. Tighten retaining
screws to specified torque.
(9) Position shroud on radiator and install with at
taching screws.
(10) Install alternator drive belt and tighten to speci
fied tension.
(11) Connect upper radiator hose to radiator.
(12) Connect battery negative cable.
(13) Fill cooling system with correct mixture of Jeep
All-Season Coolant, or equivalent, and water. Operate
engine with heater control valve open until thermostat
opens. Shut off engine, recheck coolant level and add as
necessary.
(14) Reset clock, if equipped.
Water Pump Tests
Loose Impeller
NOTE: DO NOT WASTE reusable coolant. If solution
is clean and is being drained only to service the cooling
system, drain coolant into a clean containerfor reuse.
WARNING: DO NOT remove cylinder block drain
plugs or loosen radiator draincock with system hot and
under pressure because serious burns from coolant can
occur.
(1) Drain cooling system.
(2) Loosen fan belt.
(3) Disconnect lower radiator hose from water
pump.
(4) Bend stiff clothes hanger or welding rod (fig. 1C-
5).
(5) Position rod in water pump inlet and attempt to
hold impeller while turning fan blades. If impeller is
loose and can be held with rod while fan blades are
turning, pump is defective. If impeller turns, pump is
OK.
NOTE: If equipped with a Tempatrol fan, turn water
pump shaft with socket and breaker bar attached to a
mounting flange nut.
(6) Connect hose and install coolant, or proceed
with further repairs.
IMPELLER
50470
Fig. 1C-5 Testing Water Pump lor Loose Impeller—Typical