Pontiac FIREBIRD 1972 Service Manual page 800

6E-38 1972 PONTIAC SERVICE MANUAL
quired. The movable breaker plate is lubricated by lubri-
cant from the upper shaft bushing. The lubricator wick
(used on models equipped with 60p.s.i. oil pump) is not to
be re-oiled. Recommended replacement of wick is 12
months, or 12,000 miles.
This distributor also requires periodic inspection of cap
and rotor, wiring, and point condition, and a check for
correct spark timing. This should be done at each tune-up
and at least every spring and fall.
ADJUSTMENT
1. With engine operating, raise window provided in cap.
2. Insert hex type wrench into head of adjusting screw
as shown in Fig. 6E-52.
3. Turn screw to adjust point opening by one of the
following methods:
Preferred Method
Turn adjusting screw until 30" dwell is obtained as
measured by dwell meter. (When using dwell meter,
be sure to test distributor resistance and "zero" meter
before testing dwell angle).
Alternate Method
Turn adjusting screw (clockwise) until engine begins
to misfire. Then turn screw one-half turn in opposite
direction (counterclockwise). This will give proper
dwell angle.
REMOVE
1. Disconnect distributor-to-coil primary wire.
2. Remove distributor cap.
Fig. 6E-52 Adjusting Dwell Angle
Fig.
6E-53
Rotor in No. 1 Firing Position
-
V-8
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 timing chain
cover, Fig. 6E-53, 6E-54 and 6E-55.
4. Remove vacuum hose from distributor
5. Remove distributor clamping screw and hold-down
clamp.
6. Remove distributor and distributor to block gasket.
It will be noted that rotor will rotate as distributor is
pulled out of block. Note relationship of rotor and
disti-ibutor housing after removal, so that rotor can
be set in same position when distributor is being in-
stalled.
NOTE: Always set distributor in upright posi-
tion so oil from distributor shaft will not run
out onto breaker plate and points.