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ENGINES-8-CYLINDER
947
N U T \
'
'TORQUE
WRENCH
(TOOL)
\
&
SOCKET
ANVIL
( T O O L )
-
MAIN SCREW
(TOOL)
KR168 B
Fig.1 10-Testing Fit of Piston Pin in
Connecting Rod Tool C-3684
connecting rod.
(10) Remove the tool and arrange tool parts and
piston assembly in the same manner, as shown in
Figure 106.
(11) Place the assembly in
a
vise, as shown in Fig-
ure 110.
(12) Attach the torque wrench to nut and test
torque up to 15 foot-pounds torque.
If
the connect-
ing rod moves downward on piston pin, reject this
connecting rod and piston combination. Obtain a con-
necting rod with proper small end bore diameter and
repeat the installation and checking procedure.
(13) If the connecting rod does not move under 15
foot-pounds torque, the piston pin and connecting
rod interference is satisfactory and the tool may be re-
moved.
KR169
Fig. 1 1 I-Showing
location of External Engine
Numbering Pad
CONNECTING ROD-IDENTIFICATION
A Maltese Cross stamped on the engine numbering
pad (Fig. 111) indicates that the engine is equipped
with a crankshaft which has one or more connecting
rods and main bearing journals finished .001 inch un-
dersize. However on 273 and 318 cubic inch engines
with a B following engine serial number and/or on
361, 383 and 426 cubic inch engines with a "X' fol-
lowing a maltese cross indicates that all main jour-
nals and/or all rod journals are .010 inch undersize.
The position of the undersize journal
or
journals will
be stamped on the machined surface of the NO. 3
counterweight (Fig. 112).
Connecting rod journals will be identified by the
letter
"R'
and main bearing journals by the
letter
"M." For example "M-1" indicates that
NO.
1 main
bearing is .001 inch undersize.
CONNECTING ROD BEARINGS
Installation
NOTE:
Fit all
rods
on one bank until completed.
Do not alternate from one bank to another,
be-
cause when the
rods
are assembled to pistons cor-
rectly, they are not interchangeable from one bank
to another.
Connecting rod bearings caps have a small "V"
groove across the parting face. When installing a low-
er bearing, the "V" groove of the bearing must be
placed on the "V" groove side of the cap. This pro-
vides lubrication of the cylinder wall in the opposite
bank. Also, the tangs in the steel back
must be
placed
in the grooves in the rods and caps. The connecting
rod side play for the 273 and 318 cubic inch engine
should be .006 to .014 inch (two rods) and
.009
to .017
inch for the 361, 383 and 426 cubic inch engines.
The limits of taper or out-of-round on any crank-
shaft journals should be held to .001 inch. Bearings
are available in .001, .002, .003, .010 and .012 inch
K K
162
Fig. 112-Showing
Location of Marking
of
No. 3 Counterweight
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