Checks And Adjustments Off Vehicle; Exploded View Of 6-Cylinder Distributor - Pontiac Grand Prix Service Manual

ENGINE ELECTRICAL
6E-15
adjust to .016" with used points and .019" with new.
Retighten screw securely after setting is 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 fue No. 1
cylinder and timing mark on harmonic balancer is
indexed with the proper mark on the lower timing belt
cover (Fig. 6E-33).
4. Remove vacuum line from distributor.
5. Remove distributor clamping nut and hold-down
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 compressor
mounting bracket in engines equipped with air
conditioning.
CA UTION: Always set distributor in upright position so
oil fiom distributor shaft will not run out onto breaker
plate andpoints.
The distributor may be placed in a distributor testing
machine or synchroscope to check for variation of
spark and centrifugal and vacuum advance.
IMPORTANT: When checking dwell angle, the vacuum
advance must be in full retard or no vacuum advance
position, since the dwell angle may vary with vacuum
advance on these types of distributors. The procedure
for replacing contact set, and adjusting point opening
is covered under CHECKS AND ADJUSTMENITS OF
DISTRIBUTOR ON VEHICLE.
DISASSEMBLY AND ASSEMBLY
DISASSEMBLE (Fig. 6E-27).
1. Remove rotor.
2. Disconnect primary and condenser leads from
between plastic retainer and breaker set spring.
Remove breaker points adjusting hold-down screw and
remove breaker points assembly.
SHAFT AND
WEIGHT BAS VACUUM
ADVANCE
CONTACT SET
WEIGHT HOLD
DOWN PLATE
SPACER WEIGHT SPRING
BREAKER CAM
DRIVE
~cE~~w~:L
GEAR
PIN WEIGHTS
Fig. 6E-27 Exploded View of 6-Cylinder Distributor
4. Remove condenser and bracket.
5. Remove screws from vacuum advance diaphragm
bracket. With slight downward pressure to disengage
lever, remove vacuum advance assembly.
6. Remove screws securing breaker plate and remove
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.
INSTALL
3. Remove primary lead and retainer.
1. Check to see that engine is at fuing position for No.