Chevrolet Light Duty Truck 1973 Service Manual page 396

6 6 0 E N G IN E
Fig. 29V—Removing Camshaft
camshaft sprocket then install sprocket on
camshaft.
4. Draw the camshaft sprocket onto camshaft using
the mounting bolts. Torque to specifications.
5. Lubricate timing chain with engine oil.
6. Install fuel pump push rod as outlined in Section
6M.
7. Install grille as outlined in Section 13.
8. Install crankcase front cover as outlined.
9. Install valve lifters as outlined.
Flywheel
Removal
With transmission and/or clutch housing and clutch
removed from engine, remove the flywheel.
Installation
1. Clean the mating surfaces of flywheel and
crankshaft to make certain there are no burrs.
2. Install flywheel on crankshaft and position to align
dowel hole of crankshaft flange and flywheel (fig.
30V).
NOTE: On Automatic
equipped engines, the flywheel must be
installed with the flange collar to transmis­
sion side (fig. 30V).
3. Coat thread end of bolts with sealer then install
bolts and torque to specifications.
Engine Mounts
Engine mounts (fig. 31V - 36V) are the non-adjustable
type and seldom require service. Broken or deteriorated
mounts should be replaced immediately, because of the
added strain placed on other mounts and drive line
components.
Checking Engine Mounts
Front Mount
Raise the engine to remove weight from the mounts and
to place a slight tension in the rubber. Observe both
mounts while raising engine. If an engine mount
exhibits:
Replace the mount. If there is relative movement
between a metal plate of the mount and its attaching
points, lower the engine on the mounts and tighten the
screws or nuts attaching the mount to the engine, frame,
or bracket.
Rear Mount
Raise the vehicle on a hoist. Push up and pull down on
the transmission tailshaft while observing the transmis­
sion mount. If the rubber separates from the metal plate
of the mount or if the tailshaft moves up but not down
(mount bottomed out) replace the mount. If there is
relative movement between a metal plate of the mount
and its attaching point, tighten the screws or nuts
attaching the mount to the transmission or crossmember.
Front Mount Replacement
1. Remove distributor cap.
2. Remove mount retaining bolt from below frame
3. Raise front of engine and remove mount-to-engine
Transmission
a. Hard rubber surface covered with heat check
cracks;
b. Rubber separated from a metal plate of the
mount; or
c. Rubber split through center.
mounting bracket.
bolts and remove mount.
Raise engine only enough for
CAUTION:
SYNCHROMESH
Fig. 30V—Flywheel Installation (Typical)
CONVERTER |"^ R IN G
BOLT AREA ^ GEAR
DEPRESSED I
WELDS
^ENGINE TRANS.
AUTOMATIC
LIGHT DUTY TRUCK SERVICE MANUAL