Pontiac tempest 1968 Service Manual page 364

E N G I N E E L E C T R I C A L
6E-15
J T J r
A B O V E CARBURETOR £-
THROTTLE PLATES
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B E L O W CARBURETOR
THROTTLE PLATES
Fig o 6 E - 2 3 Positions o f Vacuum Hoses - V - 8 Distributor
INSTALL
1. Check to see that engine is at firing position for
No. 1 cylinder (No. 1 piston at top of compression
stroke) and timing mark on harmonic balancer is
indexed with the proper mark on the lower timing
belt cover (Fig. 6E-29).
2. Position new distributor to block gasket on
block.
3. Before installing distributor, index rotor with
housing as noted when distributor was removed Fig.
6E-28. This will simplify indexing the distributor
shaft and gear with oil pump drive shaft and dis­
tributor drive gear. Distributor and rotor will be
positioned properly when installed with No. 1 piston
in firing position.
4. Replace distributor clamp leaving nut loose
enough to allow distributor to be turned for timing
adjustment.
5. Attach distributor to coil primary wire.
6. Replace distributor cap.
7. Adjust timing and then tighten distributor clamp
nut.
8. Attach vacuum line(s) to distributor.
DISTRIBUTOR-8 CYLINDER ENGINE
PERIODIC SERVICE
A permanent lubricant reservoir is built into the
distributor housing to lubricate upper end of shaft.
No periodic lubrication is required.
When replacing contact set assembly apply a trace
of petrolatum to breaker cam. No other lubrication
is required. The movable breaker plate is lubricated
by lubricant from the upper shaft bushing.
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-24.
!
F i g . 6 E - 2 4 Adjusting Dwell Angle
3. Turn screw to adjust point opening by one of the
foUowing 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 before testing
dwell angle.)