26—ENGINE
CHRYSLER SERVICE MANUAL
51x60
Fig.
44—Fitting Piston Pins in Connecting Rod
and the following oversizes, .005, .020, .040
and .060 inch, (C-75 only).
e. Fitting Rings
Measure piston ring gap about two (2) inches
from bottom of cylinder bore in which it is to
be fitted. (An inverted piston can be used to
push the rings down to position.) This will in-
sure positioning rings exactly square with cyl-
inder wall before measuring. Insert feeler stock
in gap (Fig. 42). The ring gap should be be-
tween .010 to .020 inch. This measurement is
the same for all rings. Measure clearance be-
tween piston ring and ring groove (Fig. 43).
The clearance should be .0015 to .0030 inch for
top compression ring, .001 to .0025 inch for
intermediate ring, and .001 to .003 for oil con-
PISTON PIN
57x227
trol ring. Starting with oil ring expander, place
expander ring in lower ring groove and install
oil control ring. Install compression rings, in
top and middle grooves. Use ring installer,
Tool C-3418.
NOTE:
Be sure the mark "Top" on each com-
pression ring is to the top of piston when ring
is installed.
f. Fitting Pins
The piston pin should be a tight thumb press
fit in connecting rod (Fig. 44) and in piston
(Fig. 45) at normal room temperature, 70°F.
If proper fit cannot be obtained with standard
pins,
ream piston and connecting rod, and in-
stall oversize piston pin. Piston pins are sup-
plied in standard and the following oversizes:
.003 and .008 inch. Assemble pistons to rods
on right cylinder bank (2, 4, 6, and 8), with
the indent on piston head opposite to the larger
chamfer on the large end of connecting rod.
Assemble pistons to rods on left cylinder bank
(1,
3, 5, and 7) with the indent on the piston
head on the same side as the larger chamfer
on large end of connecting rod.
29.
CONNECTING RODS
IMPORTANT
A Maltese Cross stamped on the engine number-
ing pad (Fig. 46) indicates that engine is
equipped with a crankshaft which has one or
more connecting rods and main bearing jour-
nals finished .001 inch undersize. The position
3/8"
3/8
Kfflfc
56x247
Fig.
45-Fitting Piston Pin in Piston (Typical)
Fig.
46—External Identification (Parts other than
standard size)
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