Chrysler Windsor C-67 1955 - Page 88

CHRYSLER SERVICE MANUAL
COOLING SYSTEM—87
VARIABLE RESISTANCE
VARIABLE FIELD
POLE SHOES
IDENTIFICATION NUMBER LOCATION
IGNITION SWITCH
AMMETER
DASH UNIT
ENGINE UN*
53x527
Fig. 5—Water Temperature Gauge
engine. Install flushing- gun Tool C-311, or
other suitable flushing gun in radiator outlet
hose. Fill radiator and turn on air in short
blasts.
NOTE
Do not apply excessive pressure when pressure
flushing radiator, as damage to radiator may
result.
Continue this procedure until water runs
clean. Refill cooling system. Run engine and
check for leaks.
8. WATER TEMPERATURE GAUGE (Fig. 5)
a. Dash Unit
Consists of two electro-magnets, one connected
to the ignition switch and a ground holds the
gauge pointer to (C) cold position when igni-
tion switch is turned on and the other con-
nected to a ground in the engine registers the
water temperature.
b. Sending Unit
The sending unit is located in the water pump
housing and transmits the water temperature
to dash unit.
c. Electrical Circuit (Testing)
Remove wire at sending unit and turn ignition
switch on. Gauge hand should not move. If hand
56x229
Fig. 6—Radiator Pressure Cap
moves, the wire is grounded or gauge is defec-
tive. Remove wire at dash gauge terminal
"GA", and if hand still moves, replace dash
gauge; otherwise, replace wire. If gauge op-
erates correctly and wire is not grounded, re-
place the engine unit.
9. THERMOSTAT (Testing)
The thermostat starts to open at 160 to 165
degrees F. and is fully opened at 189 degrees.
Place thermostat in a pail of water with a
thermometer and heat water until thermostat
starts to open. Check thermometer and continue
heating until thermostat is wide open, and
again check thermometer. Replace thermostats
that do not open completely, open at too low
temperature or open at too high temperaure.
10. RADIATOR PRESSURE CAP
Radiators are equipped with a standard seven
psi cap, as shown in Figure 6. Cars equipped
with air conditioning use a 14 psi cap. Always
check identification number on cap, when re-
placing.
WARNING
When removing pressure cap, turn it counter-
clockwise to the stop, permitting built up pres-
sure to escape through overflow tube. This will
prevent hot water from spraying out of radiator
filler opening.
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