170—ENGINE
CHRYSLER SERVICE MANUAL
without inserting piston and rod in cylinder
bore, eliminating any possible drag that might
be caused between piston and cylinder wall.
NOTE
Fit all rods of one bank until completed. Do
not alternate from one bank to another, be-
cause, when rods are assembled to pistons cor-
rectly, they are not interchangeable from one
bank to another.
Each bearing cap has a small "V" groove
across the parting face. When installing the
lower bearing shell, make certain that "V"
groove in shell is in line with "V" groove in
cap.
This allows lubrication of the cylinder
wall. The bearing shells should always be in-
stalled so that small formed tang fits into ma-
chined grooves of rods.
Limits of taper or out-of-round on any crank-
shaft journal should be held to .001 inch. Un-
dersize bearings are serviced in .001, .002, .003,
.010,
and .012.
32.
CHECKING CONNECTING ROD
BEARING CLEARANCE
The correct connecting rod bearing shell clear-
ance is from .0005 to .0015 inch. Place a piece
of oiled .001 inch feeler stock (1/2 inch wide
and % inch long) between bearing shell and
crankshaft journal. Make sure shim edges are
smooth. Install bearing cap and tighten cap
to 45 foot-pounds torque.
NOTE
Install bearing in pairs. Do not use a new bear-
ing half with an old bearing
half.
Do not file
rods or bearings caps.
Move connecting rod and piston from side
to side (Fig. 52). A slight drag should be felt
as rod is moved. This will indicate that clear-
ance is .001 inch or less which is satisfactory.
If connecting rod is difficult to move, the bear-
ing shell is too small and should be replaced
with the correct size. Make sure that tangs on
bearing inserts fit grooves in connecting rods
and caps. The side play should be from .006
to .014 inch (two rods).
33.
INSTALLING PISTON AND CONNECTING
ROD ASSEMBLY IN CYLINDER BLOCK
Before installing pistons, rods, and rod assem-
blies in bore, be sure that compression ring
gaps are diametrically opposite one another
and not in line with oil ring gap. The oil ring
expander gap should be toward the outside of
"V" of engine. The oil ring gap should be
turned toward the inside of the "V" of engine.
Immerse piston head and rings in clean en-
gine oil, slide ring compressor, Tool C-385,
over piston, and tighten with special wrench
(part of Tool C-385). Be sure position of rings
does not change during this operation.
Screw connecting rod bolt protector (part of
Tool C-3221) on one rod bolt, and insert rod
and piston into cylinder bore. Attach puller
part of Tool C-3221 on the other bolt, and
guide the rod over crankshaft journal.
Tap piston down in cylinder bore, using
handle of a hammer. At the same time, guide
connecting rod into position on crankshaft
journal. The notch or groove on top of piston
must be pointing toward front of engine and
the larger chamfer of connecting rod bore must
be installed toward crankshaft journal fillet.
Install rod caps, tighten nuts to 45 foot-pounds
torque.
34.
CRANKSHAFT
The crankshaft journals should be checked for
excessive wear, taper and scoring. Journal
grinding should not exceed .012 inch under the
standard journal diameter. DO NOT grind
thrust faces of No. 3 main bearing. After re-
grinding remove rough edges from crankshaft
oil holes and clean out all oil passages.
35.
CRANKSHAFT BEARINGS
The halves of Number 1, 2 and 4 bearings are
interchangeable (the bearing caps are not in-
terchangeable and should be marked at re-
moval to insure correct reassembly. Number 3
bearing, which controls the crankshaft end
thrust, is not interchangeable with the others.
The upper and lower halves however, of Num-
ber 3 bearing are interchangeable. Number 5
bearing halves are not interchangeable.
IMPORTANT
A Maltese Cross stamped on the engine number-
ing pad (Fig. 48) indicates that engine is
equipped with a crankshaft which has one or
more connecting rod and main bearing jour-
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