"Crankshaft Grinding" on page 11B-49.
Bearings which are 0.002" undersize are
available to compensate for slight journal
wear where it is unnecessary to regrind
the crankshaft.
NOTE
Bearing shells are NOT reworkable
from one undersize to another un-
der any circumstances.
Inspect the crankshaft thrust washers.
If the washers are scored or worn exces-
sively or the crankshaft end play is ex-
replaced,
must
be
they
cessive,
Improper clutch adjustment can contrib-
ute to excessive wear on the thrust
Inspect the crankshaft thrust
washers.
Refer to "Install Crankshaft"
surfaces.
If, after dressing or
on page 11B-50.
Figure 11B-93. Crankshaft Thrust
new
regrinding the thrust surfaces,
W a s h e r in Place
standard size thrust washers do not hold
the crankshaft end play within the speci-
2. Install the lower main bearing shell so
f i e d l i m i t s , i t may be necessary to install
that the tang on the bearing fits into the
oversize thrust washers on one or both
groove in the bearing cap.
A new
sides of the rear main bearing.
standard size thrust washer is 0.1190" to
washers
3. Assemble the crankshaft thrust wash-
are
0.1220" thick.
Thrust
er (Figure 11B-93) before installing the
a v a i l a b l e in 0.005" and 0.010" oversize.
rear m a i n b e a r i n g c a p .
Clean both
halves of each thrust washer carefully
and remove any burrs from the washer
Install Main Bearing Shells (Crankshaft
seats--the slightest burr or particle of
i n Place)
dirt may decrease the clearance between
the washers and the crankshaft beyond
Make sure all of the parts are clean.
Slide the upper
the specified limit.
T h e n a p p l y c l e a n e n g i n e oil
to
each
halves of the thrust washers into place.
crankshaft journal and install the upper
Then assemble the lower halves over the
main bearing shells by reversing the se-
d o w e l pins in the bearing cap.
quence of operations given for removal.
NOTE
The upper and lower main bearing shells
are not alike; the upper bearing shell is
The main bearing caps are bored
grooved and drilled for lubrication -- the
in position and stamped 1, 2, 3,
Be sure to
lower bearing shell is not.
etc. (see Figure 11B-94 on page
install the grooved and drilled bearing
They must be installed
shells in the bearing caps, otherwise the
in their original positions with the
oil flow to the bearings and to the upper
marked side of each cap toward the
end o f t h e c o n n e c t i n g rods w i l l b e
blower side of the cylinder block.
Used bearing shells must
blocked off.
be reinstalled on the same journal from
which they were removed.
4. With the lower main bearing shells in-
stalled in the bearing caps, apply a small
1. When installing an upper main bearing
quantity of International Compound No.
shell with the crankshaft in place, start
2, or equivalent, to the bolt or stud and
the plain end of the bearing shell around
nut threads and the bolt head (or nut)
the crankshaft journal so that, when the
contact area.
Install the bearing caps
bearing is in place, the tang will fit into
and draw the bolts (or nuts) up snug.
the groove in the bearing support.
Then rap the caps sharply with a soft
hammer to seat them properly and tight-
en all bolts to 45-55 lb-ft (61-75 Nm)
11B-60
