Radiator Identification; Radiator Maintenance; Thermostat Calibrations; Testing Thermostat - Jeep J-10 Series 1982 Technical & Service Manual

fi$$$\
0.003 INCH
(0.076MM)
FEELER
GAUGE
THERMOSTAT
Rg. 1C-8 Testing Thermostat
Thermostat Calibrations
42959
4-, 6- and 8-Cyl
Must Be Open 0.003-Inch (0.076 mm)
90°C
195°F
Must Be Fully Open
103°C
218°F
80399
prevents air from flowing forward around the radiator
and recirculating through the core.
Radiator Identification
Radiators are identified by a Jeep part number and
the vendor build code number embossed on the upper
tank. Certain Cherokee, Wagoneer and Truck models
have the code located at the radiator right side support.
Radiator Maintenance
NOTE: To test a radiator for leaks or pressure loss,
refer to Cooling System Leakage Tests.
The radiator should be free from any obstruction of
airflow. This includes bugs, clogged bug screens, leaves,
mud, emblems, flags, fog or driving lamps, improperly
mounted license plates, large, nonproduction bumper
guards or collision damage.
NOTE: Remove dirt and other debris by blowing com
pressed airfrom the engine side of the radiator through
the cooling fins.
COOLING SYSTEMS 1C-11
sanssa
Radiator Identification
Blackstone B2
or
/V^
BLK
/ \
/
/
\
Vendor
Month Year
Blackstone
A- -Jan
1-1981
B--Feb 2-1982
M 78 05
/ / \ \ \
Vendor
Last two digits Vendor
Month
Year
Modine of Vendor
Assembly 01-Jan
1-1981
Part Number Plant 02-Feb
2-1982
60336
Any one of several faults or defects can affect radiator
operation:
• bent or damaged tubes,
• corrosion deposits restricting coolant flow,
• cooling tubes restricted because of improper
soldering.
Repair damaged tubes that affect proper operation.
Coolant leaks can be detected by applying 3 to 5 psi (21
to 34 kPa) air pressure to the radiator while it is sub
merged in water. Cover leak holes or fractures with
solder. Clean a clogged radiator with solvent or by re
verse flushing. Refer to Cooling System Maintenance.
Replacement—All Models
NOTE: DO NOT WASTE reusable coolant. If solution
is clean and is being drained only to service the cooling
system, drain 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 burnsfrom coolant can
occur.
(1) Position drain pan under radiator and remove
draincock. Observe WARNING above.
(2) Remove radiator cap.
(3) Disconnect upper radiator hose.
(4) Disconnect coolant recovery hose, if equipped.
(5) For certain four-cylinder engine models, it may
be necessary to remove charcoal canister and bracket.
(6) Remove fan shroud screws, if equipped.
(7) Remove top radiator attaching screws.
(8) Remove lower hose.
(9) Disconnect and plug transmission fluid cooler
pipes, if equipped with automatic transmission.
(10) Remove bottom radiator attaching screws.
(11) Remove radiator.
(12) Install replacement radiator.