Starting System; Installation Of Spark Plugs; Installation Of Spark Plug Wires - Chevrolet 10 1971 Series Chassis Service Manual

Fig. 14i — L—6 Spark Plug Wire Installation
gages will not give a correct measurement if the elec­
trodes are worn. Adjust gap by bending the side elec­
trodes only; bending the center electrode will crack the
insulator. Adjust gaps to specification. Setting spark plug
gap to other than specification to effect changes in engine
performance is not recommeded.
Before adjusting gap, file center elec­
CAUTION:
trode flat. In adjusting the spark plug gap, never
bend the center electrode which extends through
the porcelain center. Always make adjustment by
bending the ground or side electrode.

Installation of Spark Plugs

When installing spark plugs, make sure that all surfaces
G e n e ra l D e s c r i p t i o n ............................... .......................................... 6Y-23
M a inte na nce and A d j u s t m e n t s ....................................................... 6Y-24
L u b r ic a t io n ......................................................................................... 6Y-24
R e s is tan c e C h e c k s ..........................................................................6Y-24
The function of the starting system, composed of the
starting motor, solenoid and battery, is to crank the
engine. The battery supplies the electrical energy, the
solenoid completes the circuit to the starting motor, and
the motor then does the actual work of cranking the engine.
The starting motor (fig. Is) consists primarily of the
drive mechanism, frame, armature, brushes, and field
on plugs and in cylinder heads are clean. When installing
the 5/8" hex tapered seat spark plugs, tighten to 15 lb. ft.,
using a 5/8,; deep socket, an extension and a torque
wrench.

Installation of Spark Plug Wires

No. 1 spark plug wire is installed in the first distributor
cap tower after the adjusting window, moving in the direc­
tion of rotation (V-8), or in the foremost tower (L-6). The
other wires are then installed in a clockwise direction
according to the firing order (figs. 14i and 15i).

STARTING SYSTEM

INDEX
Page
Starting M o to r and Solenoid C h e c k s ........................................6Y-25
C om ponent P a r t R e p lac e m e n t .................................. * ..................6Y-25
R e m o v a l and In s ta lla tio n ..............................................................6Y-25
GENERAL DESCRIPTION
windings. The starting motor is a 12-volt extruded frame
type, having four pole shoes and four fields, connected
with the armature. The aluminum drive end housing is
extended to enclose the entire shift lever and plunger
mechanism, protecting them from dirt, splash, and icing.
The flange mounted solenoid switch operates the overrun­
ning clutch drive by means of a linkage to the shift lever.
Fig. 15i —V —8 Spark Plug Wire Installation
If tapered seat spark plugs are over-
CAUTION:
tightened, they will be more difficult to remove
at the next tune-up.
ENGINE-ELECTRICAL 6Y-23
Page
10-30 CHEVROLET TRUCK SERVICE MANUAL