GMC 1976 ZEO 6083 Maintenance Manual page 436

6Y- 56 ENGINE ELECTRICAL
Figure 59-Ohmmeter Check of Pick-Up Coil
DISTRIBUTOR INSTALLATION
1 . Push the distributor down into position in the
engine block.
2. Install distributor hold-down clamp and
tighten clamp screw snugly .
3. Move distributor housing to approximate posi-
tion relative to engine as noted during removal.
4. Position distributor cap to housing with tab in
base of cap aligned with notch in housing and secure
with four latches.
5 . Connect wiring harness connector to terminals
on side of distributor cap. Connector will fit only one
way. Connect battery ground cable.
6. Adjust ignition timing as described earlier in
this section.
Installation-Engine Disturbed
NOTE : To insure correct timing of the distribu-
tor, the distributor must be installed with the
rotor correctly positioned .
If the engine was accidentally cranked after the
distributor was removed, the following procedure
can be used for installing the distributor .
1 . Remove No . 1 spark plug .
2. Disconnect feed wire connector at the "BAT"
terminal from distributor to prevent engine from
starting .
3 . Place finger over No . 1 spark plug hold and
crank engine slowly until compression is felt .
4. Align timing mark on crankshaft pulley to "0"
on engine timing indicator.
5 . Turn rotor to point between No . 1 and No . 8
spark plug towers on distributor .
6. Install distributor and connect feed wire .
7. Install distributor cap and spark plug wires.
8. Check engine timing .
DISTRIBUTOR DISASSEMBLY (FIGURE
49)
1 . Remove distributor from engine as described
above .
2. Remove rotor (figure 60) from distributor
shaft by removing two screws .
3. Before removing gear from distributor shaft,
scratch a mark on geat and shaft for correct reassem-
bly. If gear is assembled 180° from original position,
the timing will be changed one half tooth.
4. Using a small drift, drive out roll pin retaining
gear to shaft.
CAUTION:
Distributor gear should be sup-
ported in push a way that no damage will
damage will occur to the distributor shaft
while removing pin .
5 . Remove driven gear. Some distributors may
have washers between gear and distributor housing,
or on the housing itself. Remove and replace washers
as required .
6. Check role pin hole on shaft for burrs. Remove
shaft and weight assembly from housing (figure 61).
7. If necessary, remove two advance springs,
weight retainer, and advance weights .
8 . Disengage plastic wiring insulator from hous-
ing. Disconnect wiring leads from module where
connector may be removed from "B" and "C" termi
nals . Remove wires from "W" and "G" module ter-
minals .
9. Remove retainer from upper end of distributor
housing.