V-8
ENGINE
6-63
Fig.
6-110
Measuring
Plastigage
journal
or bearing surface.
Install
the cap
and
tighten
cap bolts to proper torque.
NOTE;
Do not turn crankshaft with Plastigage in
place.
3. Remove bearing cap and using Plastigage scale
on
envelope (Fig. 6-110), measure
width
of com-
pressed Plastigage before removing it
from
the
bearing
or
journal.
If the bearing clearance is be-
tween
.0002" and .0020", the clearance Is satis-
factory.
If the clearance is more than .0020", replace
the bearing
with
the next size undersize bearing and
recheck clearance. Bearings are available in stan-
dard
size, .001" and .002" undersize.
4.
Install
a new rear
main
bearing oil seal In the
cylinder
block
and
main
bearing cap if the rear
main
bearing
was checked and/or replaced.
5. Replace oil pump,
cylinder
block
to oil
baffle
tube,
and oil
baffle
if they were previously removed.
6. Replace oil pan, using new gaskets.
CONNECTING
ROD
BEARINGS-
REMOVE
AND
REPLACE
1.
Remove oil pan (see Oil Pan - Remove and
Replace).
•
2. To gain
access
to numbers 5, 6, 7 or 8 con-
necting
rod
caps
it
will
be
necessary
to remove oil
pump
screen and oil
baffle.
Pump must be removed
as an assembly. Screen tube Is a
press
fit In pump
tody
and
must not be rotated or removed.
3. Rotate crankshaft as
necessary
to
bring
crank
NO.
1 NO. 2
CONNECTING
CONNECTING
ROD CAP
ROD
CAP /
V
/
Fig.
6-111
Crankshaft
Positioned
For
Removal
of
No.
1 and No. 2
Connecting
Rod
Caps
pin
carrying
bearing to be replaced straight
down
(Fig.
6-111).
4.
Remove bearing cap of bearing to be replaced.
5.
Install
connecting rod
bolt
guide set J 5239 on
connecting
rod bolts (Fig. 6-113).
6. Push piston and rod assembly up far enough to
allow
removal of bearing
shell.
Remove bearing
shells
from
rod and cap.
7.
Inspect crank pin for damage, out-of-round, and
taper.
8. Reassemble cap and rod
with
new bearing shells
and
check fit, using Plastigage as
outlined
below.
CA
UTION;
Under no circumstances should
a
bear-
ing
cap be filed or shimmed in an effort to affect
a fit.
NOTE;
In 1968, a number of 2 bbl. equipped V-8's
will have .010'[undersize crankpins. These crank-
shafts may be identified by a .010" U.S.
stamp
on
the front of the No. 1 counterweight and the rear of
No.
8 counterweight. A check should be
made
for
this undersize crankshaft before replacing rod
bearings.
PLASTIGAGE
METHOD
FOR
DETERMINING
CONNECTING
ROD
BEARING
CLEARANCE
1.
Remove the cap of the bearing to be checked.
Wipe
the bearing and the crankpin free of
oil.
2.
Place a piece of type PG-l Plastigage the length
of
the bearing
(parallel
to the crankshaft) on the
crankpin
or bearing surface.
Install
the cap and
tighten
cap bolts to 43 lb. ft.
NOTE;
Do not turn crankshaft
with
Plastigage in
place.
3. Remove bearing cap and using Plastigage scale
on
envelope (Fig. 6-110) measure
width
of com-
pressed Plastigage before removing it
from
the
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