Engine Mounts; Front Mount Replacement; Rear Mount Replacement - Chevrolet 10 1971 Series Chassis Service Manual

ENGINE 6-24
S Y N C H R O M E SH
Fig. 20 L— Flywheel Installation (Typical)
dowel hole of crankshaft
(fig. 20L).
3. Install flywheel retaining
specifications.
(292 cu. in. Engine)
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 holes of crankshaft flange and flywheel.
3. Install flywheel retaining bolts
specifications.
The interference fit dowel pins used on
NOTE:
292 cu. in. engines must be replaced with an
oversize dowel pin when installing the flywheel.
4. When installing the original flywheel, ream the dowel
pin holes with Tool J-22808-2. When installing a
new flywheel, first ream the dowel pin holes with
Tool J-22808-2 and then finish reaming them with
Tool J-22808-1 (fig. 21L).
5. Install oversize dowel pins flush with flywheel re­
taining bolt surface.
6. Install rear main bearing cap and torque bolts
to specifications. Install oil pan with new gaskets
and seals. Torque oil pan retaining screws to
specifications.

Engine Mounts

Engine mounts (fig. 22 L) 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.

Front Mount Replacement

If only one mount appears to be damaged
NOTE:
or deteriorated, check opposite mount for future
serviceability by raising engine sufficiently to
produce a light strain on rubber portion of
mount. Observe mount for signs of separation
and/or deterioration.
C O N V E R T E R T U R I N G
BOLT A R E A - I G E A R
D EP RESSED
W E L D S
^E N G IN E TR A N S ..
A U T O M A T IC
flange and flywheel
bolts and torque to
and torque to
Fig. 21 L— Reaming Flywheel Dowel Pin Holes
1. Remove frame bracket to mount bolt.
2. Raise engine enough to clear mount.
3. Remove mount and install new mount.
4. Install new mount and torque bolts to specifications.
5. Lower engine then install frame bracket to mount
bolt and torque to specifications.

Rear Mount Replacement

1. Raise and support vehicle.
2. Bend mount bolt french lock tabs away from bolt
head, then remove mount bolts, lower mount and
spacer.
3. Raise engine enough to clear upper mount assembly
and remove upper mount from frame member.
On models using a propeller shaft brake
NOTE:
of any type, it is necessary to remove screws
from transmission hole cover to allow the engine
to raise because of the limited clearance be­
tween the brake and transmission hole cover.
4. Place new upper mount in place on frame member,
then lower engine to within 1/4 inch of mount.
5. Align mount so that guide dowel enters hole in mount,
install bolt through french lock, lower mount and
spacer, then install bolt up through frame, upper
mount and thread into engine bell housing loosely.
6. Lower engine completely and tighten mount bolt,
then bend tabs of french lock to lock the bolt in place.
10-30 CHEVROLET TRUCK SERVICE MANUAL