Chevrolet 1977 light duty truck, Service Manual

Page: 453 / 861

F R O N T M O U N T R E A R M O U N T
Fig. 6A-10-G Series Engine M ounts
ON VEHICLE SERVICE
ENGINE MOUNTS
Engine m ounts (Fig. 6A-4 - 6A-10) are the non-
adjustable type and seldom require service. Broken or
deteriorated m ounts should be replaced im mediately,
because o f the . added strain placed on other mounts and
drive line components.
C hecking Engine Mounts
Front M o u n t
Raise the engine to remove weight from the mounts
and to place a slight tension in the rubber. Observe both
m ounts while raising engine. If an engine mount
exhibits:
a. H ard ru b b e r surface covered with heat check
cracks;
b. R u b b e r separated from a metal plate o f the
mount; or
c. R u b b e r split through center,
Replace the mount. If there is relative movem ent
between a metal plate o f the mount and its attaching
points, lower the engine on the mounts and tighten the
screws or nuts attaching the m ount to the engine, frame,
or bracket.
Rear M ou n t
Raise the vehicle on a hoist. Push up and pull down
on the transmission tailshaft while observing the
transmission mount. If the ru b b e r separates from the
metal plate o f the mount or if the tailsahft moves up but
not down (m ount bottom ed out) replace the mount. If
there is relative movem ent between a metal plate o f the