Sears 161.2161 - Points-Dwell Test and Adjustment; Delco-Remy Distributor Adjustment; Non-window Distributor Adjustment

POINTS-DWELL TEST AND ADJUSTMENT
15 20 25 30
~V:~~:"~~
10 \ l I I L I I I 50 5
o aCYL 0 30 50 70 60 aCYL 0
E 6CYL ~'\I"111"111j1ll1~ 6CYL 'E
L 4CYL 4CYL L
1/8" ALLEN
WRENCH
B. Raise the metal window and turn the
point adjusting screw with an 1/8" Allen
wrench until the dwell reading is the
same as specified by the manufacturer.
(FIGURE 7 )
On engines that have non-window type distri-
butors, adjust dwell as follows:
1. Remove coil wire from center tower of dis-
tributor cap and ground the wire by p!acing tne
loose end so it touches the engine or frame.
2. Remove the distributor cap and rot~.
5. To adjust dwell, loosen the locking screw (s)
slightly and adjust the point gap according to
the procedure outlined in the vehicle's service
manual. There are a number of mechanical
methods for adjusting breaker points. Two
typical methods are shown in FIGURE 8. Tighten
locking screw, and recheck dwell while crank-
ing engine. Repeat procedure if necessary.
6. Reassemble distributor and recheck dwell read-
ing with engine operating at idle speed. Repeat
4 and 5 if necessary.
3. Connect a remote starter switch to test
vehicle or have an assistant crank the engine
for you.
4. With ignition switch on and engine cranking,
observe reading on the Dwell..:s:..;:c:.;:a.:le,:;.:.:- _
Check the owners manual or
engine compartment decal.
Follow instructions regarding
vacuum line or advance-
retard solenoid connections.
Vacuum line must be discon- r:...~'\~"
nected from distributor. ~) ),., '
~
~"II'I
~ §!;, 11l1ii~~\1
1111
11
"\\
PLUG END OF
VACUUM LINE
Connect the tester as s own in FIGURE or 6.
Set the slide switch knob to OTHER TESTS and
the Function Selector Knob to DWELL.
Operate the engine at idling speed and observe
the Dwell reading on the scale that corresponds
to the number of cylinders in the engine being
tested.
If the dwell reading is higher or lower than the
manufacturer's specification:
1. On Delco-Remy distributors with a sliding
metal window in the cap:
A. Operate the engine at idle RPM.
NOTE: This test and adjustment is performed
on cars with conventional ignition systems and
breaker-point transistor ignition systems. It is
not used on cars equipped with electroni c igni-
tion systems that do not have breaker points.
SLOTTED HOLE
FIGURE
8.
ADJUSTMENT
LOC
KING SCREW--_-..::::;6Z..I
TYPICAL
DISTRIBUTOR
BREAKER
POINT
CONSTRUCTION
3
NOTE: It is important to recheck the ignition timing every time the points are adjusted.