Chevrolet 30 Series 1967 Service Manual page 312

ENGINE 6-32
oil off the parting line surface as this is treated with
glue. Gradually push with a hammer handle, while
turning crankshaft, until seal is rolled into place.
(Similar to installing a main bearing.) Be careful
that seal tangs at parting line do not cut bead on back
of seal.
. Install the rear main bearing cap (with new seal) and
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torque to specifications.
Torsional Damper
Removal
1. Remove fan belt, fan and pulley.
2. Remove the radiator and shroud assembly as outlined
in Section 13.
NOTE: If additional operations (such as cam­
shaft removal) are not being performed, the ra­
diator removal will not be necessary on vehicles
using the 366 cu. in. engine.
3. Remove accessory drive pulley then, if so equipped,
remove damper retaining bolt.
4. Install Tool J-6978 on damper then, turning puller
screw, remove damper (fig. 9V).
NOTE: Tool J-6978 has holes forming two pat­
terns. A two bolt and a three bolt pattern. The
holes for the two bolt pattern must be elongated
for use on the 366 cu. in. engine.
Installation
CAUTION: The inertia weight section of the
torsional damper is assembled to the hub with
a rubber type material. The installation pro­
cedures (with proper tool) must be followed or
movement of the inertia weight section on the
hub will destroy the tuning of the torsional
damper.
1. Coat front cover seal contact area (on damperj with
engine oil.
2. Install damper on crankshaft as follows:
283 and 327 cu. in ENGINE
a. Attach damper installer Tool J-22197 on damper
then adjust fingers of tool to prevent inertia
weight moving (fig. 10V).
b. Position damper in alignment with crankshaft
keyway then drive into position (fig. 34) (until it
bottoms on crankshaft sprocket) and remove tool
from balancer.
366 cu. in. ENGINE
a. Place damper in position over key on crankshaft.
Fig . 9 V —Removing Torsional Damper
Fig. 10V— Installing Torsional Damper (283 and 327)
b. Using Tool J-21058 pull torsional damper onto
crankshaft (fig. 11V).
NOTE:
If radiator has not been removed from
the vehicle a l/2 " -2 0 x 5" bolt and a 1 /2"-20
nut may be used in place of the bolt and nut
from Tool J-21058.
CAUTION: Install bolt in crankshaft with suf-
ficient thread engagement (min.
c. Remove tool from crankshaft then install damper
retaining bolt and torque to specifications.
3. Install accessory drive pulley.
4. Install radiator and shroud as outlined in Section 13.
5. Install fan and pulley to water pump hub and tighten
securely.
F ig . 11V —Installing Torsional Damper (366)
/ " ).
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CHEVROLET TRUCK SERVICE M ANUAL