Cooling System Maintenance; Engine Flushing; Solvent Cleaning - Jeep J-10 Series 1982 Technical & Service Manual

1C-16 COOLING SYSTEMS
CABLE
TIE
VIEW A
TYPICAL 4-CYL. ENGINE
81021
ROUTE CORD BETWEEN ENGINE
MOUNT BRACKET AND BLOCK
TYPICAL 6-CYL. ENGINE
TYPICAL 8-CYL. ENGINE
800S3B
800S3C
Fig. 1C-14 Cylinder Block Heiter Installation
COOLING SYSTEM MAINTENANCE
CAUTION: The cooling system normally operates at
12 to 15 psi (83 to 103 kPa) pressure. Exceeding this
pressure may damage the radiator, heater core, or
hoses.
Engine Flushing
(1) Remove thermostat housing cover (four- and
eight-cylinder engine) or housing (six-cylinder engines)
and thermostat. Install thermostat housing cover or
housing.
(2) Disconnect upper radiator hose from radiator
and attach flushing gun to hose.
(3) Disconnect lower radiator hose from water
pump and attach leadaway hose to water pump inlet
fitting.
CAUTION: Ensure heater control valve is closed (heat
off). This will prevent coolant flow with scale and other
deposits from entering heater core.
(4) Connect water supply and air supply hoses to
flushing gun.
(5) Allow engine to fill with water.
(6) When engine is filled, apply air in short blasts,
allowing system to fill between air blasts. Continue until
clean water flows through leadaway hose. Remove lead-
away hose, flushing gun, water supply hose and air
supply hose.
(7) Remove thermostat housing cover or housing
and install thermostat. Install thermostat housing cover
or housing with replacement gasket.
(8) Connect radiator hoses.
(9) Refill cooling system with correct antifreeze-
water mixture.
Solvent Cleaning
In some instances, the use of a radiator cleaner (Jeep
Radiator Kleen, or equivalent) before flushing will
soften scale and deposits and aide the flushing
operation.
CAUTION: Ensure instructions on the container are
followed.