Chevrolet CHEVY VAN G10 SERIES Service Manual page 228

M a i n t e n a n c e .......................................
P eriod ic M a i n t e n a n c e ................................................... 6Y -1 7
S p ark Plugs ................................................................ 6Y -1 7
C ables ............................................................................. 6 Y -17
A d ju stm en t an d R e p a i r s ....................
D istrib u to r C o n ta c t P o in ts
C lea n in g ..............................................
R ep la cem en t ................................................................ 6 Y -17
S etting D w ell A n g l e .................................................6 Y -18
D istrib u to r C o n d e n s e r .................................................6 Y -2 0
PERIODIC M AINTENANCE
The distributor breaker points and spark plugs are the only
ignition system com ponents th a t require periodic service. The
rem ainder o f the ignition system requires only periodic inspec­
tion to check operation o f th e units, tightness o f th e electrical
connections, and condition o f th e wiring. When checking the
coil, test w ith a reputable tester.
The distributors are equipped w ith a cam lubricator, which
should be ro tated 180° every
2 4,000 miles. Do n o t a ttem p t to lubricate the elem ent, b u t
replace w hen necessary.
D istributor shaft lubrication is accom plished by a reservoir
o f lube around the m ainshaft in the distributor body.
DISTRIBUTOR CONTACT POINTS
Cleaning
D irty contact points should be dressed with a few strokes
o f a clean, fine-cut contact file. The file should not be used for
other m etals and should n ot be allowed to becom e greasy or
dirty.
Never use emery cloth to clean contact points.
surfaces, after considerable use, m ay n o t appear bright and
sm ooth, b u t this is n o t necessarily an indication th at th ey are
n o t functioning satisfactorily. Do n o t attem pt to remove all
roughness nor dress the p o in t surfaces dow n sm ooth; merely
remove scale or dirt.
Badly b urned or p itted contact points should be replaced
and th e cause o f trouble determ ined so it can be elim inated.
High resistance or loose connections in th e condenser circuit,
oil or foreign materials on the con tact surfaces, im proper point
adjustm ent or high voltages m ay cause oxidized contact
points. Check for these conditions where burned contacts are
experienced. An out-of-balance condition in the ignition
system , o ften the result o f too m uch or to o little condenser
capacity, is indicated where point pitting is encountered.
IGNITION SYSTEMS
P age
6 Y -1 7
6 Y -1 7
6 Y -1 7
6 Y -1 7
MAINTENANCE
12,000
miles and replaced every
ADJUSTMENTS
C ontact
INDEX
P erfo rm an ce D iagnosis
R e p lacem en t ................................................................ 6 Y -2 0
D istrib u to r
R e m o v a l ........................................................................6 Y -2 0
D isassem bly ................................................................ 6 Y -2 0
C lean in g an d In sp ec tio n
A ssem b ly
In stallatio n
S p ark P lug an d W ire Service
Spark Plugs
Should be rem oved, inspected, cleaned and regapped at
tune-up. Defective plugs should be replaced. Refer to Section
6
, Tune-up.
Cables
The low and high tension cables should be examined
carefully for brittle or cracked insulation and broken strands.
Defective insulation will perm it missing or cross firing o f the
engine. Connections should be clean and tight.
AND REPAIRS
Replacement
Six Cylinder Engine Distributor
1. Release d istributor cap hold-dow n screws, remove cap
and place it o u t o f w ork area.
2. Remove ro to r and dust shield.
3. Pull prim ary and condenser lead wires from contact point
quick disconnect term inal (Fig. li).
4. Remove contact set attaching screw, lift contact point set
from breaker plate.
5. Clean breaker plate o f oil smudge and dirt.
6
. Place new contact point assembly in position on breaker
plate, install attaching screw.
N O T E : Pilot on contact set must engage matching
hole in breaker plate.
7. Connect prim ary and condenser lead wires to quick
disconnect term inal on contact point set.
N O T E : Breaker lever spring tension and point
alignment are factory set. O nly dwell angle requires
adjustment.
ENGINE E LEC TR IC A L 6Y-17
Page
6 Y -2 0
6 Y -2 0
6Y -21
6Y -21
6 Y -23
6 Y -2 4
C H E V Y V A N SHOP M A N U A L