Pontiac tempest 1968 Service Manual page 363

6E-14
1968 P O N T I A C SERVICE M A N U A L
made. Reset timing and tighten distributor clamp
bolt.
CHECKS AND ADJUSTMENTS OFF VEHICLE
REMOVE
1. Disconnect distributor-to-coil primary wire.
2. Remove distributor cap.
3. Crank engine so rotor is in position to fire No.
1 cylinder and timing mark on harmonic balancer Is
Indexed with the proper mark on the lower timing
belt cover (Fig. 6E-29).
4. Remove vacuum line s from distributor.
5. Remove distributor clamping nut and holddown
clamp from stud.
6. Remove distributor. It will be noted that rotor
will rotate as distributor Is pulled out of block. Note
relationship of rotor and distributor housing after
removal so that rotor can be set in the same position
when distributor is being installed.
NOTE: It is NOT necessary to remove compres­
sor mounting bracket in engines equipped with air
conditioning.
CA UTION: Always set distributor in upright po­
sition so oil from distributor shaft will not run out
onto breaker plate and points.
The distributor may be placed in a distributor
testing machine or synchroscope to check for varia­
tion of spark and centrifugal and vacuum advance.
IMPORTANT: When checking dwell angle, the
vacuum advance must be in full retard or no vacu­
um advance position, since the dwell angle may
vary with vacuum advance on these types of
distributors.
The procedure for replacing contact set, and ad­
justing point opening is covered under Checks and
Adjustments of Distributor on Vehicle.
DISASSEMBLY AND ASSEMBLY
DISASSEMBLE (Fig. 6E-22)
1. Remove rotor.
2. Disconnect primary and condenser leads from
between plastic retainer and breaker set spring.
Remove breaker points adjusting the hold-down
screw and remove breaker points assembly.
3. Remove primary lead and retainer.
F i g . 6 E - 2 2 Exploded View of 6-Cylinder Distributor
4. Remove condenser and bracket.
5. Remove screws from vacuum advance dia­
phragm bracket. With slight downward pressure to
disengage lever, remove vacuum advance assembly.
6. Remove screws securing breaker plate and re­
move breaker plate.
7. Remove roll pin from driven gear and remove
driven gear and washer.
8. Pull shaft and weight base assembly and washer
out of distributor housing and remove screws and
washers securing centrifugal advance upper plate.
9. Remove weight control springs, weights from
base plate and pull breaker cam assembly from main
shaft.
ASSEMBLE
Assembly of the distributor is the reverse of the
disassembly procedure outlined above. Coat upper
end of shaft with grease before installing breaker
cam. When installing the gear on shaft, use a new
roll pin. The pin must be tight in hole to prevent any
movement between gear and shaft.