PISTON, CONNECTING ROD, AND BEARING REPAIR (Contd)
c. Inspection (Contd)
Connecting rod assembly
Using suitable micrometer,
Do not measure where connecting
measure crankpin bore diameter.
rod (5) and connecting rod cap (7)
meet. Discard if diameter is not
within 3.3157 in. (84.219 mm) and
3.3171 in. (84.254 mm) up to 30
on either side of parting line,
3.3157 in. (84.219 mm) and
3.3167 in. (84.244 mm) 30 on
either side of parting line.
Connecting rod checking
a. Use new connecting rod assembly
fixture (ST-561) (14)
(4) that has been checked for cor-
rect absolute center length of
12.00 in. (304.8 mm) between bore
b. Perform steps 18a and b.
c. Place new connecting rod
assembly (4) into fixture.
d. Place correct piston pin man-
drel (15) into piston pin bore.
e. Install expanding arbor (16)
into crankpin bore and tighten
until snug. Ensure pin on expand-
ing arbor (16) is down and locked
in position in center of new con-
necting rod assembly (4).
f. Move dial holder until contact
points of indicators touch mandrel
(15) in piston pin bore.
g. Set indicator dials' checking fix-
ture to zero.
h. Remove new connecting rod
assembly (4) from fixture. Turn
rod assembly horizontally 180
and put back into fixture (14).
i. If dial indicators show any
change from first reading, adjust
dials to divide difference. Fixture
is now calibrated.
Connecting rod (5)
a. Assemble correct connecting rod
assembly (4), pin mandrel (15),
and expanding arbor (16).
b. Put into calibrated connecting
rod checking fixture (14).
c. Take reading for length.
Discard if longer than rod used to
calibrate fixture or more than
0.002 in. (0.050 mm) shorter.
d. Take reading for alignment of
Discard if difference in readings
of bores. Turn connecting rod
is more than 0.010 in. (0.254 mm)
assembly (4) 180 and take reading
without bushing (9) installed, or
0.004 in. (0.101 mm) with rod
bushing (9) installed.