CHRYSLER SERVICE MANUAL
•CTRICAL SYSTEM—27
Be sure all compound is removed from plug.
Adjust gap with round gauge to .035 inch by
bending side electrode only.
c. Installation
NOTE:
Spitfire engines are equipped with %
inch base plug, as shown in Figure 26, A. Fire
Power engines have a % inch base, as shown
in Figure 26, B. Both plugs use an extended
electrode for better efficiency and performance.
Where necessary to replace spark plugs, always
use same type plug as one removed. Do not use
short electrode plug in place of extended elec-
trode or interchange % inch base plugs with
% inch base plugs.
To assure good heat transfer clean seats in
head and also tube (double rocker shaft en-
gines).
Use new gaskets on plugs for single
rocker shaft engines. No gaskets are used on
double rocker shaft engines. When installing
plugs in double rocker shaft engines, place plug
in socket wrench and lower tube over plug,
(Fig. 27), before installing. Tighten plugs 32
foot-pounds torque.
46.
HIGH TENSION CABLES, DISTRIBUTOR
CAP AND ROTOR
a. Cables
Clean high tension cables and inspect for cracks
and chafed spots. Replace damaged cables. Fit
terminals to spark plug caps so they will fit
snugly when installed. Terminal clips should
fit tight in cap towers.
TUBE
Fig.
26—Spark Plugs
a. Spitfire
b. Firepower
56x321A
R51x394B
Fig.
27—Removing
and
Installing Spark Plugs
b.
Distributor Cap and Rotor
Inspect cap for cracks and clean corrosion
from towers. Inspect electrodes for excessive
burning. Inspect rotor for cracks and burned
tip.
Inspect brush spring for distortion and be
sure carbon brush moves freely in cap. Push
cables all the way into towers.
47.
IGNITION COIL
Clean oil and dust from coil. Clean corrosion
from secondary tower and push cable all the
way in. Be sure primary leads are connected to
proper primary terminals according to polarity
markings. The coil is designed to operate with
a ballast resistor. The resistor is mounted on
the coil bracket and must be included with coil
when making a test of primary output. Coils
that are tested without resistor will appear to
be defective.
Check coil for external leaks and arcing. Al-
ways make two tests when checking coil. One
when coil is cold, the other after coil has
warmed up. The ballast resistor and coil must
be tested together for output. To check the high
tension circuit, pull secondary cable out of dis-
tributor cap. Hold end of cable about *4 of an
inch away from cylinder head and crank engine
with engine ignition switch on. If spark jumps
*4 inch gap, coil can be considered satisfactory.
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