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59 COOLING SYSTEM
The water jacket plugs used in the left side of
the cylinder block are a drive fit and can be easily
installed fusing tool J-2793 as illustrated in Figure
7. Use a light coat of H u d s on Perfect Seal Paste
to facilitate installation and improve the sealing.
The plug is started into place and then driven into
the block with the installer until the shoulder of
the installer contacts the block. Figure 7.
RADIATOR
REMOVAL
1. Drain radiator and disconnect hoses.
2. Remove two sheet metal screws attaching
deflector shield to fender tie panel.
3. Disengage headlamp wiring from retaining
clips at front of radiator.
4. Remove the four hexagon bolts attaching the
radiator to "U" channel and remove radiator.
INSTALLATION
Reverse procedure of removal.
NOTE: Proper clearance between the fan blades
and radiator core is 7/8".
Should the f an be too close, there is danger of
damaging the radiator on an emergency stop. If set
too far from the core, cooling efficiency will be
impaired particularly at low speed.
Provision for adjusting the positions of the
radiator core is by means of elongated holes at
each side of the radiator mounting channel. A cap
screw and a lip in each bracket fits in the elon-
gated holes and limits the amount of adjustment.
COOLING SYSTEM DIAGNOSIS
EXCESSIVE ENGINE TEMPERATURE
CAUSES
1. Ignition timing too late or too early.
2. Fan belt slipping.
3. Radiator or cylinder block clogged or restricted.
4. Radiator core outside surface covered by grille
covers, ornaments, etc.
5. Outward air passages clogged with bugs or dirt
accumulations.
6. Thermostat defective.
7. Collapsed water pump inlet hose.
8. Pump impeller loose on shaft or improper clearance
of impeller in pump housing.
9. Engine fan blades not set at proper pitch.
10. High engine friction resulting from:
a. Insufficient internal clearance
b. Internal misalignment
c. Use of heavy engine oil
d. Inadequate oil circulation
11. Dragging brakes or tight wheel bearing.
12. Use of certain types of anti-freeze solutions in
warm weather.
13. Slipping clutch.
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