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9-48
ENGINES-8-CYLINDER
undersize. Install the bearings in pairs.
Do
not
use a
new bearing half with an old bearing half. Do not file
the rods or bearing caps.
MEASURING CONNECTING ROD
BEARING CLEARANCE
Shim
Stock
Method
(1) Place an oiled .001 inch
feeler stock
( V 2
inch
wide and % inch long) between bearing and con-
necting rod journal.
(2) Install bearing cap and tighten to 45 foot-
pounds torque.
(3) Turn the connecting rod % turn in each direc-
tion. A slight drag should be felt which indicates
clearance is satisfactory. The correct clearance is
from .0005 to .0015 inch.
(4) The side play for the 273 and 318 Cubic Inch
Engine should be .006 to ,014 inch (two rods) and
.009 to .017 inch for 361, 383 and 426 Cubic Inch En-
gines.
PISTON AND CONNECTING ROD
ASSEMBLY
lnstallation
(1) Before installing the pistons, rods, and rod
as-
semblies in the bore, be sure that compression ring
gaps are staggered
so
that neither are in line with the
oil ring rail gaps.
(2) The oil ring expander ends should be positioned
toward the outside of the "V" of the engine. The oil
ring rail gaps should be positioned opposite each oth-
er and above the piston pin holes.
(3) Immerse the piston head and rings in clean en-
gine oil, slide the ring compressor, Tool C-385, over
the piston and tighten with the special wrench (part
(4)
Be sure the position of the rings does not
change during this operation. Screw the connecting
rod bolt protector (part of Tool (3-3221) on one rod
bolt, and insert the rod and piston into cylinder bore.
NOTE:
Rotate the crankshaft so that the connecting
rod journal
i s
on center of the cylinder bore,
(5) Attach the puller part of Tool C-3321 on the
other bolt, and guide the rod over the crankshaft
journal, as shown in Figure 113.
(6)
Tap the piston down in the cylinder bore, using
the handle of a hammer. At the same time, guide the
connecting rod into position on the crankshaft jour-
nal.
(7) The notch or groove on the top of the piston
must be pointing toward the front of the engine and
the larger chamfer of the connecting rod bore must be
installed toward the crankshaft journal fillet.
(8)
Install the rod caps, and tighten nuts to 45 foot-
pounds torque.
Of
To01 C-385).
Fig.
1 1
3-Removing
or Installing
Connecting Rod Using Tool C-3221
CRANKSHAFT MAIN JOURNALS
The crankshaft journals should be inspected for
excessive wear, taper and scoring. Journal grinding
should not exceed .012 inch under the standard jour-
nal diameter. DO NOT grind the thrust faces of NO. 3
main bearing. DO NOT nick the crankpin or main
bearing fillets. After regrinding, remove the rough
edges from the crankshaft oil holes and clean out all
the oil passages.
CRANKSHAFT MAIN BEARINGS
The upper main bearings are not interchangeable
with the lower main bearings. On 273 and 318 cubic
inch engines (Fig. 114), bearing numbers 1, 2 and
4
are interchangeable as complete bearings. On 361,
383 and 426 cubic inch engines (Fig. 115), bearings
2,
4
and 5 are interchangeable as complete bearings.
The NO. 1 upper main bearing is not interchangeable
and is chamfered on the tab side for timing chain oil-
ing and can be identified by a red marking on the
THRUST BEARING
Fig.
I
/&Main
Bearing Identiffcation
2 7 3 and 318 Cubic Inch
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