Pontiac tempest 1968 Service Manual page 367

6E-18
1968 P O N T I A C SERVICE MANUAL
•ASSEMBLE • .
Assembly of the distributor is reverse of dis­
assembly procedure outlined above. When installing
gear on shaft use a new retaining pin. The pin must
be tight i n hole to prevent any movement between
gear and shaft.
Note that rotor can be Installed in only one posi­
tion. I t will be broken i f an attempt is made to install
i t backwards.
NOTE: Some GTO, Firebird and 428 HO distrib­
utors will have cadmium plated, hardened drive
gears. Whenever one of these distributors or gears
is replaced, an identical replacement part must be
used. Engines built- with hardened gears have a
60 psi oil pump spring, and early failure will re-
stilt if a normal gear is used.
INSTALL
1. Check to see that engine is at firing position
for No. 1 cylinder (No. 1 piston at top of compres­
sion stroke) and timing mark on harmonic balancer
is indexed with the proper mark on the timing chain
cover (Fig. 6E-30).
2. Position new distributor to block gasket on
block.
3. Install distributor in block so that vacuum dia­
phragm faces left side of engine and rotor points
toward contact in cap for No. 1 cylinder. Before
installing distributor, index rotor with housing as
noted when distributor was removed. This will sim­
plify indexing distributor shaft and gear with oil
pump drive shaft and drive gear on camshaft. Dis­
tributor and rotor will be positioned as shown in
Fig. 6E-27 when properly installed with No. 1 piston
in firing position.
Kill™
DISTRIBUTOR
HOUSING ,
F i g . 6 E - 2 7 Rotor in N o . 1 Firing Position - V - 8
4. Replace distributor clamp, leaving screw loose
enough to allow distributor to be turned for timing
adjustment.
5. Attach distributor to coil primary wire.
6. Replace distributor cap.
7. Adjust dwell and timing and then tighten dis­
tributor clamp screw.
8. Attach vacuum lines to distributor.
If engine was turned with distributor removed and
position of rotor was not noted at removal of dis­
tributor, it may be installed by the following method.
1. Remove No. 1 spark plug (forward plug on left
bank on V - 8 ) .
2. Place finger in spark plug hole and turn engine
over until timing mark is at index (see Fig. 6E-30).
NOTE: As engine approaches timing mark, a
pressure should be felt with the finger in the spark
plug hole. If no pressure is felt, it will be neces­
sary to turn the engine one complete revolution
and again index with timing marks.
3. Install distributor in position as shown on Figs.
6E-27. It will be necessary to rotate rotor slightly
to the right for a V - 8 and to the left for a 6-cyl.
when attempting installation so that final position
will be correct.
NOTE: If distributor does not drop into position
fully, hold down on housing and rotate engine until
distributor drops into position.
F i g . 6E-28 Rotor in N o . 1 Firing Position - 6 Cylinder